From the FDA label

Wegovy side effects

In Wegovy's FDA label (revised Jun 18, 2026), the most common side effects at 2.4 mg were nausea (44% vs 16% on placebo), diarrhea (30% vs 16%) and vomiting (24% vs 6%).

Source: FDA label on DailyMed (Novo Nordisk Pharmaceutical Industries, LP), revised , version 19. Read every day: a new FDA version updates this page by itself.

At 2.4 mg

How often Wegovy side effects happened

Table 3. Adverse Reactions (≥2% and Greater Than Placebo) in WEGOVY 2.4 mg Injection-treated Adults with Obesity or Overweight for Weight Reduction

Side effectWegovy 2.4 mgPlacebo
Nausea44%16%
Diarrhea30%16%
Vomiting24%6%
Constipation24%11%
Abdominal pain20%10%
Headache14%10%
Fatigue11%5%
Indigestion9%3%
Dizziness8%4%
Bloating7%5%
Gas6%4%
Reflux5%3%
Hair loss3%1%

People in the trial reporting each side effect, as FDA prints it. The placebo column is the rate among people given no medication, which is why a side effect can be common on both.

Boxed warning

  • In rodents, semaglutide causes dose-dependent and treatment-duration-dependent thyroid C-cell tumors at clinically relevant exposures. It is unknown whether WEGOVY causes thyroid C-cell tumors, including medullary thyroid carcinoma (MTC), in humans as human relevance of semaglutide-induced rodent thyroid C-cell tumors has not been determined [see Warnings and Precautions ( 5.1 ), Nonclinical Toxicology ( 13.1 )].
  • WEGOVY is contraindicated in patients with a personal or family history of MTC or in patients with Multiple Endocrine Neoplasia syndrome type 2 (MEN 2) [see Contraindications ( 4 )]. Counsel patients regarding the potential risk for MTC with the use of WEGOVY and inform them of symptoms of thyroid tumors (e.g., a mass in the neck, dysphagia, dyspnea, persistent hoarseness). Routine monitoring of serum calcitonin or using thyroid ultrasound is of uncertain value for early detection of MTC in patients treated with WEGOVY [see Contraindications ( 4 ), Warnings and Precautions ( 5.1 )].

Source: Wegovy prescribing information (FDA label on DailyMed), revised 2026-06-18

Serious side effects

What the label warns about

Section 5 of the label, word for word.

Risk of Thyroid C-Cell Tumors

In mice and rats, semaglutide caused a dose-dependent and treatment-duration-dependent increase in the incidence of thyroid C-cell tumors (adenomas and carcinomas) after lifetime exposure at clinically relevant plasma exposures [see Nonclinical Toxicology ( 13.1 )] . It is unknown whether WEGOVY causes thyroid C-cell tumors, including MTC, in humans, as human relevance of semaglutide-induced rodent thyroid C-cell tumors has not been determined.

Cases of MTC in patients treated with liraglutide, another GLP-1 receptor agonist, have been reported in the postmarketing period; the data in these reports are insufficient to establish or exclude a causal relationship between MTC and GLP-1 receptor agonist use in humans.

WEGOVY is contraindicated in patients with a personal or family history of MTC or in patients with MEN 2. Counsel patients regarding the potential risk for MTC with the use of WEGOVY and inform them of symptoms of thyroid tumors (e.g., a mass in the neck, dysphagia, dyspnea, persistent hoarseness).

Routine monitoring of serum calcitonin or using thyroid ultrasound is of uncertain value for early detection of MTC in patients treated with WEGOVY. Such monitoring may increase the risk of unnecessary procedures, due to the low-test specificity for serum calcitonin and a high background incidence of thyroid disease. Significantly elevated serum calcitonin value may indicate MTC and patients with MTC usually have calcitonin values greater than 50 ng/L. If serum calcitonin is measured and found to be elevated, the patient should be further evaluated. Patients with thyroid nodules noted on physical examination or neck imaging should also be further evaluated.

Source: Wegovy prescribing information (FDA label on DailyMed), revised 2026-06-18

Acute Pancreatitis

Acute pancreatitis, including fatal and non-fatal hemorrhagic or necrotizing pancreatitis, has been observed in patients treated with GLP-1 receptor agonists, including WEGOVY [see Adverse Reactions (6)] . After initiation of WEGOVY, observe patients carefully for signs and symptoms of acute pancreatitis, which may include persistent or severe abdominal pain (sometimes radiating to the back), and which may or may not be accompanied by nausea or vomiting. If pancreatitis is suspected, discontinue WEGOVY and initiate appropriate management.

Source: Wegovy prescribing information (FDA label on DailyMed), revised 2026-06-18

Acute Gallbladder Disease

Treatment with WEGOVY is associated with an increased occurrence of cholelithiasis and cholecystitis. The incidence of cholelithiasis and cholecystitis was higher in WEGOVY injection-treated pediatric patients aged 12 years and older than in WEGOVY injection-treated adults. In randomized clinical trials in adults for weight reduction, cholelithiasis was reported by 1.6% of WEGOVY injection-treated patients and 0.7% of placebo injection-treated patients, and by 2.5% of WEGOVY tablet-treated patients and 1% of placebo tablet-treated patients. Cholecystitis was reported by 0.6% of WEGOVY injection-treated adult patients and 0.2% of placebo- treated patients. In a clinical trial in pediatric patients aged 12 years and older for weight reduction, cholelithiasis was reported by 3.8% of WEGOVY injection-treated patients and 0% placebo-treated patients. Cholecystitis was reported by 0.8% of WEGOVY injection-treated pediatric patients and 0% placebo-treated patients [see Adverse Reactions ( 6.1)] .

Substantial or rapid weight loss can increase the risk of cholelithiasis; however, the incidence of acute gallbladder disease was greater in WEGOVY-treated patients than in placebo-treated patients, even after accounting for the degree of weight loss. If cholelithiasis is suspected, gallbladder studies and appropriate clinical follow-up are indicated.

Source: Wegovy prescribing information (FDA label on DailyMed), revised 2026-06-18

Hypoglycemia

WEGOVY lowers blood glucose and can cause hypoglycemia.

In a trial of WEGOVY injection in adult patients with type 2 diabetes and body mass index (BMI) greater than or equal to 27 kg/m 2 for weight reduction (Study 3), hypoglycemia (defined as a plasma glucose less than 54 mg/dL) was reported in more patients treated with WEGOVY versus placebo [see Adverse Reactions (6.1)] . One episode of severe hypoglycemia (requiring the assistance of another person) was reported in one WEGOVY treated patient versus no placebo-treated patients [see Clinical Studies (14.2)] .

In glycemic control clinical trials, the risk of hypoglycemia was increased when semaglutide injection or tablet was used concomitantly with insulin or an insulin secretagogue (e.g., sulfonylurea). Patients with diabetes mellitus taking WEGOVY in combination with insulin or an insulin secretagogue may have an increased risk of hypoglycemia, including severe hypoglycemia. The use of WEGOVY in patients with type 1 diabetes mellitus or in combination with insulin has not been evaluated.

Inform patients of the risk of hypoglycemia and educate them on the signs and symptoms of hypoglycemia. In patients with diabetes, monitor blood glucose prior to starting WEGOVY and during WEGOVY treatment. When initiating WEGOVY, consider reducing the dose of concomitantly administered insulin or insulin secretagogue to reduce the risk of hypoglycemia [see Drug Interactions (7.1)] .

Source: Wegovy prescribing information (FDA label on DailyMed), revised 2026-06-18

Acute Kidney Injury Due to Volume Depletion

There have been postmarketing reports of acute kidney injury, in some cases requiring hemodialysis, in patients treated with semaglutide [see Adverse Reactions ( 6)]. The majority of the reported events occurred in patients who experienced gastrointestinal adverse reactions leading to dehydration such as nausea, vomiting, or diarrhea [see Adverse Reactions (6)].

Monitor renal function in patients reporting adverse reactions to WEGOVY that could lead to volume depletion, especially during dosage initiation and escalation of WEGOVY.

Source: Wegovy prescribing information (FDA label on DailyMed), revised 2026-06-18

Severe Gastrointestinal Adverse Reactions

Use of WEGOVY has been associated with gastrointestinal adverse reactions, sometimes severe [see Adverse Reactions (6)]. In clinical trials for adults for weight reduction, severe gastrointestinal adverse reactions were reported more frequently among patients receiving WEGOVY than placebo. Severe gastrointestinal adverse reactions were reported in 4.1% and 0.9% of WEGOVY injection and placebo-treated patients, respectively, and in 2% of WEGOVY tablet-treated and 0% of placebo-treated patients, respectively. Severe gastrointestinal adverse reactions have also been reported postmarketing with GLP-1 receptor agonists.

WEGOVY is not recommended in patients with severe gastroparesis.

Source: Wegovy prescribing information (FDA label on DailyMed), revised 2026-06-18

Hypersensitivity Reactions

Serious hypersensitivity reactions (e.g., anaphylaxis, angioedema) have been reported with WEGOVY. If hypersensitivity reactions occur, discontinue use of WEGOVY, treat promptly per standard of care, and monitor until signs and symptoms resolve. WEGOVY is contraindicated in patients with a prior serious hypersensitivity reaction to semaglutide or to any of the excipients in WEGOVY [see Adverse Reactions (6.2)] .

Anaphylaxis and angioedema have been reported with other GLP-1 receptor agonists. Use caution in a patient with a history of anaphylaxis or angioedema with another GLP-1 receptor agonist because it is unknown whether such patients will be predisposed to these reactions with WEGOVY.

Source: Wegovy prescribing information (FDA label on DailyMed), revised 2026-06-18

Diabetic Retinopathy Complications in Patients with Type 2 Diabetes

In a 2-year trial with semaglutide 0.5 mg and 1 mg once-weekly injection in adult patients with type 2 diabetes and high CV risk, diabetic retinopathy complications (which was a 4-component adjudicated endpoint) occurred in patients treated with semaglutide injection (3%) compared to placebo (1.8%). The absolute risk increase for diabetic retinopathy complications was larger among patients with a history of diabetic retinopathy at baseline (semaglutide injection 8.2%, placebo 5.2%) than among patients without a known history of diabetic retinopathy (semaglutide injection 0.7%, placebo 0.4%).

In a trial of adult patients with type 2 diabetes and BMI greater than or equal to 27 kg/m 2 for weight reduction (Study 3), diabetic retinopathy was reported by 4% of WEGOVY injection-treated patients and 2.7% placebo-treated patients [see Clinical Studies (14.2)] .

In a glycemic control trial evaluating a dose comparable to the 9 mg dose and the 25 mg semaglutide tablet dose in patients with type 2 diabetes, a similar proportion of patients in each dose group reported diabetic retinopathy related adverse reactions during the trial; 1.3% and 1.9% of patients in the 9 mg and 25 mg semaglutide group, respectively, reported moderate-severe non-proliferative diabetic retinopathy events, and 0% and 0.4% reported proliferative retinopathy events, respectively.

Rapid improvement in glucose control has been associated with a temporary worsening of diabetic retinopathy. The effect of long-term glycemic control with semaglutide on diabetic retinopathy complications has not been studied. Patients with a history of diabetic retinopathy should be monitored for progression of diabetic retinopathy.

Source: Wegovy prescribing information (FDA label on DailyMed), revised 2026-06-18

Heart Rate Increase

Treatment with WEGOVY was associated with increases in resting heart rate. Mean increases in resting heart rate of 1 to 4 beats per minute (bpm) were observed in WEGOVY injection-treated adult patients compared to placebo in clinical trials for weight reduction. More adult patients treated with WEGOVY injection compared with placebo had maximum changes from baseline at any visit of 10 to 19 bpm (41% versus 34%, respectively) and 20 bpm or more (26% versus 16%, respectively). In a clinical trial in pediatric patients aged 12 years and older with normal baseline heart rate, more patients treated with WEGOVY injection compared to placebo had maximum changes in heart rate of 20 bpm or more (54% versus 39%) [see Adverse Reactions ( 6.1)] . Findings were similar in a trial with the WEGOVY tablets.

Monitor heart rate at regular intervals consistent with usual clinical practice. Instruct patients to inform their healthcare providers of palpitations or feelings of a racing heartbeat while at rest during WEGOVY treatment. If patients experience a sustained increase in resting heart rate, discontinue WEGOVY.

Source: Wegovy prescribing information (FDA label on DailyMed), revised 2026-06-18

Pulmonary Aspiration During General Anesthesia or Deep Sedation

WEGOVY delays gastric emptying [see Clinical Pharmacology ( 12.2 )] . There have been rare postmarketing reports of pulmonary aspiration in patients receiving GLP-1 receptor agonists undergoing elective surgeries or procedures requiring general anesthesia or deep sedation who had residual gastric contents despite reported adherence to preoperative fasting recommendations.

Available data are insufficient to inform recommendations to mitigate the risk of pulmonary aspiration during general anesthesia or deep sedation in patients taking WEGOVY, including whether modifying preoperative fasting recommendations or temporarily discontinuing WEGOVY could reduce the incidence of retained gastric contents. Instruct patients to inform healthcare providers prior to any planned surgeries or procedures if they are taking WEGOVY.

Source: Wegovy prescribing information (FDA label on DailyMed), revised 2026-06-18

Never Share WEGOVY FlexTouch Between Patients

WEGOVY FlexTouch must never be shared between patients, even if the needle is changed. Pen-sharing poses a risk for transmission of blood-borne pathogens.

Source: Wegovy prescribing information (FDA label on DailyMed), revised 2026-06-18

Contraindications

Who should not take Wegovy

WEGOVY is contraindicated in the following conditions:

  • a personal or family history of MTC or in patients with MEN 2 [see Warnings and Precautions ( 5.1 )] .
  • a prior serious hypersensitivity reaction to semaglutide or to any of the excipients in WEGOVY injection or WEGOVY tablet. Serious hypersensitivity reactions, including anaphylaxis and angioedema, have been reported with WEGOVY [see Warnings and Precautions (5.7)] .

Source: Wegovy prescribing information (FDA label on DailyMed), revised 2026-06-18

Section 8 of the label

Wegovy, pregnancy and breastfeeding

Pregnancy

Pregnancy Exposure Registry

There is a pregnancy exposure registry that monitors pregnancy outcomes in women exposed to WEGOVY during pregnancy. Pregnant women exposed to WEGOVY and healthcare providers are encouraged to contact Novo Nordisk at 1-877-390-2760 or www.wegovypregnancyregistry.com.

Risk Summary

Based on animal reproduction studies, there may be potential risks to the fetus from exposure to semaglutide during pregnancy. Available pharmacovigilance data and data from clinical trials with WEGOVY use in pregnant patients are insufficient to establish a drug-associated risk of major birth defects, miscarriage or adverse maternal or fetal outcomes.

Weight loss offers no benefit to a pregnant patient and may cause fetal harm. When a pregnancy is recognized, advise the pregnant patient of the risk to a fetus. Discontinue WEGOVY in pregnant patients who are using it for weight reduction (see Clinical Considerations ).

There may be risks to the mother and fetus related to underlying MASH with advanced liver fibrosis (see Clinical Considerations ). Whether WEGOVY treatment during pregnancy reduces these risks is unknown. WEGOVY for the treatment of MASH with advanced liver fibrosis should be used during pregnancy only if the potential benefit justifies the potential risk to the fetus.

In pregnant rats administered semaglutide during organogenesis, embryofetal mortality, structural abnormalities and alterations to growth occurred at clinically relevant maternal exposures at the maximum recommended human dose (MRHD) of WEGOVY subcutaneous injection 7.2 mg/week, based on AUC. In pregnant rabbits and cynomolgus monkeys administered semaglutide during organogenesis, early pregnancy losses and structural abnormalities were observed in rabbits and monkeys at clinically relevant exposures. These findings coincided with a marked maternal body weight loss in both animal species (see Data ).

The background risk of major birth defects and miscarriage for the indicated populations are unknown. In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2% to 4% and 15% to 20%, respectively.

Clinical Considerations

Disease-Associated Maternal and/or Embryo/fetal Risk: Appropriate weight gain based on pre-pregnancy weight is currently recommended for all pregnant patients, including those who already have overweight or obesity, because of the obligatory weight gain that occurs in maternal tissues during pregnancy.

There may be risks to the mother and fetus related to MASH with advanced liver fibrosis, such as increased risks of gestational diabetes, hypertensive complications, preterm birth, and postpartum hemorrhage. The effect of WEGOVY on these risks is unknown.

Data

Animal Data: In a combined fertility and embryofetal development study in male and female rats, subcutaneous semaglutide doses of 0.01, 0.03, and 0.09 mg/kg/day (up to 0.1-fold the MRHD, based on AUC) were administered to male rats for 4 weeks prior to and throughout mating and to female rats for 2 weeks prior to mating, and throughout organogenesis to Gestation Day 17. In parental rats, pharmacologically mediated reductions in body weight gain and food consumption were observed at all dose levels. In the offspring, reduced growth and fetuses with visceral (heart blood vessels) and skeletal (cranial bones, vertebra, ribs) abnormalities were observed at clinically relevant exposures at the MRHD.

In an embryofetal development study in pregnant rabbits, subcutaneous semaglutide doses of 0.001, 0.0025, or 0.0075 mg/kg/day (up to 0.3-fold the MRHD) were administered throughout organogenesis from Gestation Day 6 to 19. Pharmacologically mediated reductions in maternal body weight gain and food consumption were observed at all dose levels. Early pregnancy losses and increased incidences of minor visceral (kidney, liver) and skeletal (sternebra) fetal abnormalities were observed at greater than or equal to 0.0025 mg/kg/day, at clinically relevant exposures at the MRHD.

In an embryofetal development study in pregnant cynomolgus monkeys, subcutaneous semaglutide doses of 0.015, 0.075, and 0.15 mg/kg twice weekly (up to 2-fold the MRHD) were administered throughout organogenesis, from Gestation Day 16 to 50. Pharmacologically mediated, marked initial maternal body weight loss and reductions in body weight gain and food consumption coincided with the occurrence of sporadic abnormalities (vertebra, sternebra, ribs) at greater than or equal to 0.075 mg/kg twice weekly, at clinically relevant exposures at the MRHD.

In a pre- and postnatal development study in pregnant cynomolgus monkeys, subcutaneous semaglutide doses of 0.015, 0.075, and 0.15 mg/kg twice weekly (up to 0.8-fold the MRHD) were administered from Gestation Day 16 to 140. Pharmacologically mediated marked initial maternal body weight loss and reductions in body weight gain and food consumption coincided with an increase in early pregnancy losses and led to delivery of slightly smaller offspring at greater than or equal to 0.075 mg/kg twice weekly, at clinically relevant exposures at the MRHD.

Salcaprozate sodium (SNAC), an absorption enhancer in WEGOVY tablets, crosses the placenta and reaches fetal tissues in rats. In a pre- and postnatal development study in pregnant Sprague Dawley rats, SNAC was administered orally at 1,000 mg/kg/day (exposure levels were not measured) on Gestation Day 7 through lactation Day 20. An increase in gestation length, an increase in the number of stillbirths and a decrease in pup viability were observed.

Source: Wegovy prescribing information (FDA label on DailyMed), revised 2026-06-18

Breastfeeding

Risk Summary

WEGOVY Oral Tablets

Data from a clinical lactation study with semaglutide oral tablet formulation reported semaglutide concentrations below the lower limit of quantification in human milk. However, SNAC and/or its metabolites are present in human milk. Since the activity of enzymes involved in SNAC clearance may be lower in infants compared to adults, higher SNAC plasma levels may occur in neonates and infants. Because of the unknown potential for serious adverse reactions in the breastfed infant due to the possible accumulation of SNAC, and because there are alternative formulations of semaglutide that do not contain SNAC that can be used during lactation, advise patients that breastfeeding is not recommended during treatment with WEGOVY tablets.

WEGOVY Subcutaneous Injection

There are no data on the presence of subcutaneously administered semaglutide or its metabolites in human milk, the effects on the breastfed infant, or the effects on milk production. WEGOVY subcutaneous injection does not contain the SNAC metabolites.

The developmental and health benefits of breastfeeding should be considered along with the mother’s clinical need for WEGOVY and any potential adverse effects on the breastfed infant from WEGOVY or from the underlying maternal condition.

Source: Wegovy prescribing information (FDA label on DailyMed), revised 2026-06-18

Section 7 of the label

What Wegovy interacts with

Concomitant Use with Insulin or an Insulin Secretagogue (e.g., Sulfonylurea)

WEGOVY lowers blood glucose and can cause hypoglycemia. The risk of hypoglycemia is increased when WEGOVY is used concomitantly with insulin or insulin secretagogues (e.g., sulfonylureas). The addition of WEGOVY in patients treated with insulin has not been evaluated.

When initiating WEGOVY, consider reducing the dose of concomitantly administered insulin secretagogue or insulin to reduce the risk of hypoglycemia [see Warnings and Precautions (5.4), Adverse Reactions (6.1)] .

Oral Medications

WEGOVY causes a delay of gastric emptying and thereby has the potential to impact the absorption of concomitantly administered oral medications. In clinical pharmacology trials with semaglutide 1 mg once weekly injection, semaglutide did not affect the absorption of orally administered medications [see Clinical Pharmacology (12.3)] . In a drug interaction study with the semaglutide tablet, levothyroxine exposure was increased 33% (90% CI: 1.25-1.42). Monitor the effects of oral medications concomitantly administered with WEGOVY. Consider increased clinical or laboratory monitoring for medications that have a narrow therapeutic index or that require clinical monitoring.

Source: Wegovy prescribing information (FDA label on DailyMed), revised 2026-06-18

Section 6

All side-effect tables and trial data in the label

Everything the label reports under adverse reactions, in its own order.

The following serious adverse reactions are described below or elsewhere in the prescribing information:

  • Risk of Thyroid C-cell Tumors [see Warnings and Precautions (5.1)]
  • Acute Pancreatitis [see Warnings and Precautions (5.2)]
  • Acute Gallbladder Disease [see Warnings and Precautions (5.3)]
  • Hypoglycemia [see Warnings and Precautions (5.4)]
  • Acute Kidney Injury Due to Volume Depletion [see Warnings and Precautions (5.5)]
  • Severe Gastrointestinal Adverse Reactions [see Warnings and Precautions (5.6)]
  • Hypersensitivity Reactions [see Warnings and Precautions (5.7)]
  • Diabetic Retinopathy Complications in Patients with Type 2 Diabetes [see Warnings and Precautions (5.8)]
  • Heart Rate Increase [see Warnings and Precautions (5.9)]
  • Pulmonary Aspiration During General Anesthesia or Deep Sedation [see Warnings and Precautions ( 5.10 )]

Clinical Trials Experience

Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical studies of another drug and may not reflect the rates observed in practice.

Adverse Reactions in Clinical Trials in Adults with Obesity or Overweight for Weight Reduction

WEGOVY 2.4 mg Subcutaneous Injection Weekly Dosage

WEGOVY was evaluated for safety in 3 randomized, double-blind, placebo-controlled trials that included 2,116 adult patients with obesity or overweight treated with 2.4 mg WEGOVY injection for up to 68 weeks and a 7-week off-drug follow-up period [see Clinical Studies ( 14.2 )] . Baseline characteristics included a mean age of 48 years, 71% female, 72% White, 14% Asian, 9% Black or African American, and 5% reported as other or unknown; and 85% were not Hispanic or Latino ethnicity, 13% were Hispanic or Latino ethnicity, and 2% reported as unknown. The baseline characteristics were 42% with hypertension, 19% with type 2 diabetes, 43% with dyslipidemia, 28% with a BMI greater than 40 kg/m 2 and 4% with CV disease.

In these clinical trials, 6.8% of patients treated with 2.4 mg WEGOVY injection and 3.2% of patients treated with placebo permanently discontinued treatment as a result of adverse reactions. The most common adverse reactions leading to discontinuation were nausea (1.8% versus 0.2%), vomiting (1.2% versus 0%), and diarrhea (0.7% versus 0.1%) for WEGOVY and placebo, respectively.

Table 3 shows adverse reactions reported in greater than or equal to 2% of WEGOVY 2.4 mg injection-treated adult patients and more frequently than in the placebo group from these trials.

Table 3. Adverse Reactions (≥2% and Greater Than Placebo) in WEGOVY 2.4 mg Injection-treated Adults with Obesity or Overweight for Weight Reduction

Table 3. Adverse Reactions (≥2% and Greater Than Placebo) in WEGOVY 2.4 mg Injection-treated Adults with Obesity or Overweight for Weight Reduction
Placebo N=1,261 %WEGOVY Injection (2.4 mg Once Weekly) N=2,116 %
Nausea1644
Diarrhea1630
Vomiting624
Constipation1124
Abdominal Pain1020
Headache1014
Fatigue511
Dyspepsia39
Dizziness48
Abdominal Distension57
Eructation<17
Hypoglycemia in T2DM26
Flatulence46
Gastroenteritis46
Gastroesophageal Reflux Disease35
Gastritis14
Gastroenteritis Viral34
Hair Loss13
Dysesthesia12

a Includes abdominal pain, abdominal pain upper, abdominal pain lower, gastrointestinal pain, abdominal tenderness, abdominal discomfort and epigastric discomfort.

b Includes fatigue and asthenia.

c Defined as blood glucose <54 mg/dL with or without symptoms of hypoglycemia or severe hypoglycemia (requiring the assistance of another person) in patients with type 2 diabetes not on concomitant insulin (Study 3, WEGOVY N=403, Placebo N=402). See text below for further information regarding hypoglycemia in patients with and without type 2 diabetes. T2DM = type 2 diabetes mellitus. d Includes chronic gastritis, gastritis, gastritis erosive, and reflux gastritis. e Includes paresthesia, hyperesthesia, burning sensation, allodynia, dysesthesia, skin burning sensation, pain of skin, and sensitive skin.

CV Outcomes Trial

In a CV outcomes trial, 8,803 patients were exposed to WEGOVY injection for a median of 37.3 months and 8,801 patients were exposed to placebo for a median of 38.6 months [see Clinical Studies (14.1)] . Safety data collection was limited to serious adverse events (including death), adverse events leading to discontinuation, and adverse events of special interest. Sixteen percent (16%) of WEGOVY injection-treated patients and 8% of placebo-treated patients, respectively, discontinued study drug due to an adverse event. Additional information from this trial is included in subsequent sections below when relevant.

WEGOVY 7.2 mg Subcutaneous Injection Weekly Dosage

The safety of WEGOVY 7.2 mg injection was evaluated in two 72-week double-blinded randomized placebo-controlled 3-armed trials (Study 8 and Study 9), including 1,311 patients with obesity (BMI ≥30 kg/m 2 ) exposed in the treatment arm with WEGOVY 7.2 mg injection, 304 patients exposed in the treatment arm with WEGOVY 2.4 mg injection, and 303 patients exposed to placebo [see Clinical Studies (14.2)] . After dosage escalation, 1,149 patients received at least one dose of WEGOVY 7.2 mg injection, and 578 patients received 7.2 mg for at least 1 year. Baseline characteristics in the WEGOVY 7.2 mg injection arm included a mean age of 49 years, 70% female, 85% White, 5% Asian, 8% Black or African American, and 2% reported as other or unknown; and 5% were Hispanic or Latino ethnicity. At baseline, mean BMI was 39.5 kg/m 2 , 52% with hypertension, 38% with dyslipidemia, 40% with a BMI greater than 40 kg/m 2 , and 14% with CV disease.

In these clinical trials, 5% of patients treated with 7.2 mg WEGOVY injection, 5% of patients treated with 2.4 mg of WEGOVY injection and 2% of patients treated with placebo permanently discontinued treatment as a result of adverse reactions. The most common adverse reactions leading to discontinuation were gastrointestinal disorders: 3%, 3%, and 0.3%, for WEGOVY 7.2 mg injection, WEGOVY 2.4 mg injection, and placebo, respectively.

Table 4 shows adverse reactions reported in greater than or equal to 2% of WEGOVY 7.2 mg injection and more frequently than 2.4 mg injection-treated and placebo-treated patients from these studies.

Table 4. Adverse Reactions (2% and Greater Than WEGOVY 2.4 mg and Placebo) in WEGOVY 7.2 mg Injection-treated Adults with Obesity for Weight Reduction

Table 4. Adverse Reactions (2% and Greater Than WEGOVY 2.4 mg and Placebo) in WEGOVY 7.2 mg Injection-treated Adults with Obesity for Weight Reduction
Placebo N=303 %WEGOVY Injection (2.4 mg Once Weekly) N=304 %WEGOVY Injection (7.2 mg Once Weekly) N=1,311 %
Nausea133539
Vomiting61622
Dysesthesia0622
Constipation81920
Abdominal pain7912
Fatigue5911
Headache789
Dizziness156
Hair loss136
Flatulence224

a Includes allodynia, burning sensation, dysesthesia, hyperesthesia, hyperpathia, pain of skin, paresthesia, sensitive skin, skin burning sensation, skin discomfort, and skin sensitization.

b Includes abdominal pain, abdominal pain upper, abdominal pain lower, gastrointestinal pain, abdominal tenderness, abdominal discomfort and epigastric discomfort.

c Includes fatigue and asthenia.

d Includes dizziness and dizziness postural.

WEGOVY Tablet 25 mg Oral Daily Dosage

WEGOVY tablet was evaluated for safety in a randomized, double-blind, placebo-controlled trial that included 204 adult patients with obesity or overweight and at least one weight-related comorbidity, treated with WEGOVY 25 mg tablets for up to 64 weeks and a 7-week off drug follow-up period (Study 7) [see Clinical Studies (14.2)] . Patients with type 2 diabetes mellitus were excluded. Baseline characteristics included a mean age of 48 years, 76% were female, 93% were White, 0.5% were Asian, 6% were Black or African American, and 8% were Hispanic or Latino ethnicity. Mean baseline body weight was 106.4 kg and mean BMI was 37.5 kg/m 2 . The baseline characteristics were 44% with hypertension, 31% with dyslipidemia, 27% with a BMI greater than 40 kg/m 2 and 1.5% with coronary artery disease.

In the clinical trial, 6.9% of patients treated with WEGOVY 25 mg tablets and 5.9% patients treated with placebo permanently discontinued treatment as a result of adverse reactions. The most common event type leading to discontinuation was gastrointestinal adverse reactions reported in 3.4% with WEGOVY tablets and 2% with placebo.

In the clinical trial with WEGOVY 25 mg tablets, the types and frequency of common adverse reactions were similar to those listed in Table 3 .

Adverse Reactions in a Clinical Trial of Pediatric Patients Aged 12 Years and Older with Obesity Treated with WEGOVY 2.4 mg Injection for Weight Reduction

WEGOVY injection was evaluated in a 68-week, double-blind, randomized, parallel group, placebo-controlled, multi-center trial in 201 pediatric patients aged 12 years and older with obesity [see Clinical Studies (14.3)] . Baseline characteristics included a mean age of 15.4 years; 38% of patients were male; 79% were White, 8% were Black or African American, 2% were Asian, and 11% were of other or unknown race; and 11% were of Hispanic or Latino ethnicity. The mean baseline body weight was 107.5 kg, and mean BMI was 37 kg/m 2 .

Table 5 shows adverse reactions reported in greater than or equal to 3% of WEGOVY injection-treated pediatric patients and more frequently than in the placebo group from a trial in pediatric patients aged 12 years and older.

Table 5. Adverse Reactions (≥3% and Greater than Placebo) in WEGOVY 2.4 mg Injection-treated Pediatric Patients Aged 12 Years and Older with Obesity for Weight Reduction

Table 5. Adverse Reactions (≥3% and Greater than Placebo) in WEGOVY 2.4 mg Injection-treated Pediatric Patients Aged 12 Years and Older with Obesity for Weight Reduction
Placebo N=67 %WEGOVY Injection (2.4 mg Once Weekly) N=133 %
Nausea1842
Vomiting1036
Diarrhea1922
Headache1617
Abdominal Pain615
Nasopharyngitis1012
Dizziness38
Gastroenteritis37
Constipation26
Gastroesophageal Reflux Disease24
Sinusitis24
Urinary tract infection24
Ligament sprain24
Anxiety24
Hair Loss04
Cholelithiasis04
Eructation04
Influenza03
Rash03
Urticaria03

Adverse Reactions in Clinical Trials in Adults with MASH Treated with WEGOVY Injection

The safety of WEGOVY injection was evaluated in a randomized, double-blind, placebo-controlled trial (Study 11) that included 1,195 adult patients with MASH, including 800 patients who were exposed to WEGOVY for a median of 95.3 weeks and 395 patients who were exposed to placebo for a median of 83.1 weeks [see Clinical Studies (14.4)].

The most commonly reported adverse reactions were consistent with the other approved WEGOVY indications (see Table 3 ). There is limited information in patients with MASH and a BMI <25 kg/m 2 . Additional information from the MASH trial is included in subsequent sections when notable. Unless indicated, the incidence of the adverse reactions in MASH patients was similar to other approved indications.

Other Adverse Reactions in Adults and/or Pediatric Patients Treated with WEGOVY Injection or WEGOVY Tablets

The safety of WEGOVY tablets and WEGOVY 7.2 mg injection have not been established in pediatric patients or patients with MASH.

Acute Gallbladder Disease

In WEGOVY clinical trials in adults for weight reduction, cholelithiasis was reported by 1.6% of WEGOVY injection-treated patients and 0.7% of placebo-treated patients and by 2.5% of WEGOVY tablet-treated patients and 1% of placebo tablet-treated patients. Cholecystitis was reported by 0.6% of WEGOVY injection-treated adult patients and 0.2% of placebo-treated patients. In a clinical trial in pediatric patients aged 12 years and older for weight reduction [see Clinical Studies ( 14.3)] , cholelithiasis was reported by 3.8% of WEGOVY injection-treated patients and 0% placebo-treated patients. Cholecystitis was reported by 0.8% of WEGOVY injection-treated pediatric patients and 0% placebo-treated patients.

Hypoglycemia

Patients with Type 2 Diabetes

In a trial of adult patients with type 2 diabetes and BMI greater than or equal to 27 kg/m 2 for weight reduction, clinically significant hypoglycemia (defined as a plasma glucose less than 54 mg/dL) was reported in 6.2% of WEGOVY injection-treated patients versus 2.5% of placebo-treated patients. A higher rate of clinically significant hypoglycemic episodes was reported with WEGOVY injection (semaglutide 2.4 mg) versus semaglutide 1 mg injection (10.7 vs. 7.2 episodes per 100 patient years of exposure, respectively); the rate in the placebo-treated group was 3.2 episodes per 100 patient years of exposure. In addition, one episode of severe hypoglycemia requiring intravenous glucose was reported in a WEGOVY injection-treated patient versus none in placebo-treated patients. The risk of hypoglycemia was increased when WEGOVY was used with a sulfonylurea.

In a glycemic control trial evaluating a dose comparable to the 9 mg and 25 mg semaglutide tablet dose in patients with type 2 diabetes not on insulin, clinically significant hypoglycemia was reported in similar proportions of subjects in both treatment groups.

Patients without Type 2 Diabetes

Episodes of hypoglycemia have been reported with GLP-1 receptor agonists in adult patients without type 2 diabetes mellitus. In WEGOVY clinical trials in adult patients without type 2 diabetes mellitus for weight reduction, there was no systematic capturing or reporting of hypoglycemia.

In a CV outcomes trial in adult patients without type 2 diabetes, 3 episodes of serious hypoglycemia were reported in WEGOVY injection-treated patients versus 1 episode in placebo. Patients with a history of bariatric surgery (a risk factor for hypoglycemia) had more events of serious hypoglycemia while taking WEGOVY injection (2.3%, 2/87) than placebo (0%, 0/97).

Retinal Disorders in Patients with Type 2 Diabetes

In a trial of adult patients with type 2 diabetes and BMI greater than or equal to 27 kg/m 2 for weight reduction, retinal disorders were reported by 6.9% of patients treated with WEGOVY injection (semaglutide 2.4 mg), 6.2% of patients treated with semaglutide 1 mg, and 4.2% of patients treated with placebo. The majority of events were reported as diabetic retinopathy (4%, 2.7%, and 2.7%, respectively) and non-proliferative retinopathy (0.7%, 0%, and 0%, respectively).

In a glycemic control trial evaluating the 9 mg and 25 mg semaglutide tablet doses in patients with type 2 diabetes, a similar proportion of patients in each dose group reported diabetic retinopathy related adverse reactions during the trial; 1.3% and 1.9% of patients in the 9 mg and 25 mg semaglutide group, respectively, reported moderate-severe non-proliferative diabetic retinopathy events, and 0% and 0.4% reported proliferative retinopathy events, respectively.

In a 2-year trial with semaglutide 0.5 mg and 1 mg once-weekly injection in adult patients with type 2 diabetes and high cardiovascular risk, diabetic retinopathy complications (which was a 4-component adjudicated endpoint) occurred in patients treated with semaglutide injection (3%) compared to placebo (1.8%). The absolute risk increase for diabetic retinopathy complications was larger among patients with a history of diabetic retinopathy at baseline (semaglutide injection 8.2%, placebo 5.2%) than among patients without a known history of diabetic retinopathy (semaglutide injection 0.7%, placebo 0.4%).

Gastrointestinal Adverse Reactions

In clinical trials in adults for weight reduction, 73% of WEGOVY injection-treated patients and 47% of patients receiving placebo reported gastrointestinal adverse reactions, including severe reactions that were reported more frequently among patients receiving WEGOVY injection (4.1%) than placebo (0.9%). The most frequently reported reactions were nausea (44% vs. 16%), vomiting (25% vs. 6%), and diarrhea (30% vs. 16%). Other reactions that occurred at a higher incidence among WEGOVY injection-treated adult patients included dyspepsia, abdominal pain, abdominal distension, eructation, flatulence, gastroesophageal reflux disease, gastritis, hemorrhoids, and hiccups. These reactions were most frequently reported during dosage escalation.

Severe gastrointestinal adverse reactions were reported in 2% of WEGOVY tablet-treated and 0% of placebo-treated patients, respectively.

In the pediatric clinical trial for weight reduction, 62% of WEGOVY injection-treated patients and 42% of placebo-treated patients reported gastrointestinal adverse reactions. The most frequently reported reactions were nausea (42% vs. 18%), vomiting (36% vs. 10%), and diarrhea (22% vs. 19%). Other gastrointestinal-related reactions that occurred at a higher incidence than placebo among WEGOVY injection-treated pediatric patients included abdominal pain, constipation, eructation, gastroesophageal reflux disease, dyspepsia, and flatulence.

Permanent discontinuation of treatment as a result of a gastrointestinal adverse reaction occurred in 4.3% of WEGOVY injection-treated adult patients versus 0.7% of placebo-treated patients. In a pediatric clinical trial for weight reduction, 2.3% of patients treated with WEGOVY injection versus 1.5% of patients who received placebo discontinued treatment as a result of gastrointestinal adverse reactions.

Dysesthesia

Dysesthesia, and related events of altered skin sensations including paresthesia, pain of skin, sensitive skin, and burning skin sensation, occurred in clinical trials with WEGOVY injection and tablet. The incidence of dysesthesia with WEGOVY increased with increasing dosage and drug levels in the blood.

In clinical trials evaluating patients with and without type 2 diabetes mellitus, WEGOVY 7.2 mg injection dysesthesia was reported at a higher rate in the WEGOVY 7.2 mg injection group (22%), compared to WEGOVY 2.4 mg injection (6%) and placebo (0.3%). Among 288 patients who experienced dysesthesia with WEGOVY 7.2 mg injection, 2% permanently discontinued treatment, 8% had temporary interruption, and 23% had dose reduction; most subjects with these actions taken to WEGOVY 7.2 mg injection (permanent discontinuation, temporary interruption, or dose reduction) recovered from the event. When an action was taken with WEGOVY, events resolved faster than the events where no action was taken with WEGOVY. Among patients who experienced dysesthesia with WEGOVY 7.2 mg injection, 18% did not report recovering during the trial duration; in most of the patients who did not recover, the WEGOVY dosage was unchanged and not discontinued. Of the patients who recovered after action taken with WEGOVY, 38 patients were re-escalated to 7.2 mg. Of these 38 patients, 17 (45%) subsequently reported recurrence of dysesthesia.

In a clinical trial with WEGOVY 25 mg tablets, 5% of WEGOVY-treated patients and no placebo-treated patients reported dysesthesia adverse reactions.

Other Adverse Reactions in Adults and/or Pediatric Patients

The below adverse reactions were reported in WEGOVY injection clinical trials and are applicable to both WEGOVY injection and WEGOVY tablets. The safety of WEGOVY tablets have not been established in pediatric patients or patients with MASH.

Acute Pancreatitis

In WEGOVY clinical trials in adults for weight reduction, acute pancreatitis was confirmed by adjudication in 4 WEGOVY-treated patients (0.2 cases per 100 patient years) and 1 in placebo-treated patients (less than 0.1 cases per 100 patient years). One additional case of acute pancreatitis was confirmed in a patient treated with WEGOVY in another clinical trial.

Acute Kidney Injury

Acute kidney injury occurred in clinical trials for weight reduction in 7 adult patients (0.4 cases per 100 patient years) receiving WEGOVY versus 4 patients (0.2 cases per 100 patient years of exposure) receiving placebo. Some of these adverse reactions occurred in association with gastrointestinal adverse reactions or dehydration. In addition, 2 patients treated with WEGOVY had acute kidney injury with dehydration in other clinical trials. The risk of renal adverse reactions with WEGOVY was increased in adult patients with a history of renal impairment (trials included 65 patients with a history of moderate or severe renal impairment at baseline), and occurred more frequently during dose titration.

Increase in Heart Rate

Mean increases in resting heart rate of 1 to 4 beats per minute (bpm) were observed with routine clinical monitoring in WEGOVY-treated adult patients compared to placebo in clinical trials for weight reduction. In weight reduction trials in which adult patients were randomized prior to dose-escalation, more patients treated with WEGOVY, compared with placebo, had maximum changes from baseline at any visit of 10 to 19 bpm (41% versus 34%, respectively) and 20 bpm or more (26% versus 16%, respectively). In a clinical trial for weight reduction in pediatric patients aged 12 years and older with normal baseline heart rate, more patients treated with WEGOVY compared to placebo had maximum changes in heart rate of 20 bpm or more (54% versus 39%).

Hypotension and Syncope

Adverse reactions related to hypotension (hypotension, orthostatic hypotension, and decreased blood pressure) were reported in 1.3% of WEGOVY-treated adult patients versus 0.4% of placebo-treated patients and syncope was reported in 0.8% of WEGOVY-treated patients versus 0.2% of placebo-treated patients in clinical trials for weight reduction. Some reactions were related to gastrointestinal adverse reactions and volume loss associated with WEGOVY. Hypotension and orthostatic hypotension were more frequently seen in patients on concomitant antihypertensive therapy. In a clinical trial in pediatric patients aged 12 years and older for weight reduction, hypotension was reported in 2.3% of WEGOVY-treated patients versus 0% in placebo-treated patients.

Appendicitis

Appendicitis (including perforated appendicitis) occurred in 10 (0.5%) WEGOVY-treated adult patients and 2 (0.2%) patients receiving placebo in clinical trials for weight reduction.

Injection Site Reactions

In clinical trials in adults for weight reduction, 1.4% of WEGOVY-treated patients and 1% of patients receiving placebo experienced injection site reactions (including injection site pruritus, erythema, inflammation, induration, and irritation).

Hypersensitivity Reactions

Serious hypersensitivity reactions (e.g., anaphylaxis, angioedema) have been reported with WEGOVY.

In a pediatric clinical trial for weight reduction, rash was reported in 3% of WEGOVY-treated patients and 0% of placebo-treated patients, and urticaria was reported in 3% of WEGOVY-treated patients and 0% of placebo-treated patients .

In adult clinical trials for weight reduction, allergic reactions occurred in 16% (8/50) of WEGOVY-treated patients with anti-semaglutide antibodies and in 7% (114/1659) of WEGOVY-treated patients who did not develop anti-semaglutide antibodies [see Clinical Pharmacology (12.6)].

Fractures

In the CV outcomes trial in adults, more fractures of the hip and pelvis were reported on WEGOVY than on placebo in female patients: 1% (24/2,448) vs. 0.2% (5/2,424), and in patients ages 75 years and older: 2.4% (17/703) vs. 0.6% (4/663), respectively.

In a clinical trial in adults with MASH, fractures occurred in 4.4% of WEGOVY-treated patients (2.6 cases per 100 patient years) compared to 3.3% of placebo-treated patients (2 cases per 100 patient years). Fractures were reported in both males and females with a median age of 61 years (range, 44 to 75).

Urolithiasis

In a CV outcomes trial, 1.2% of WEGOVY-treated patients and 0.8% of patients receiving placebo reported urolithiasis, including serious reactions that were reported more frequently among patients receiving WEGOVY (0.6%) than placebo (0.4%).

Dysgeusia

In clinical trials in adults for weight reduction, 1.7% of WEGOVY-treated patients and 0.5% of placebo-treated patients reported dysgeusia.

Hair Loss

Hair loss adverse reactions in WEGOVY injection-treated patients were associated with weight reduction. In a pool of studies 2, 3, and 4, hair loss was reported in 3.3% of patients treated with WEGOVY 2.4 mg (4% female, 0.9% male) and in 1% of patients treated with placebo (2% female, 0 male). In a pediatric trial, hair loss was reported in 4% of patients treated with 2.4 mg of WEGOVY and no placebo-treated patients.

In clinical trials with WEGOVY 7.2 mg injection, hair loss was reported in 5.8% of patients treated with WEGOVY 7.2 mg (8.4% female, 0.2% male), 3.3% of patients treated with WEGOVY 2.4 mg (5.4% female, 0 male), and 1.0% of patients on placebo (1.5% female, 0 male). In the WEGOVY 7.2 mg group, 1 event led to permanent treatment discontinuation, 1 event led to temporary interruption, and 5 events led to dose reduction, versus none of these actions in the WEGOVY 2.4 mg or placebo groups.

Laboratory Abnormalities in Adults and/or Pediatric Patients Treated with WEGOVY Injection

The below laboratory abnormalities are applicable for both WEGOVY injection and WEGOVY tablets and include descriptions of WEGOVY injection clinical trial data, where relevant. The safety and effectiveness of WEGOVY tablets have not been established in pediatric patients or patients with MASH.

Amylase and Lipase

Adult and pediatric patients treated with WEGOVY had a mean increase from baseline in amylase of 15% to 16% and lipase of 39% in clinical trials for weight reduction. These changes were not observed in the placebo group.

In a clinical trial in adults with MASH, increases in lipase greater than 3 times the upper limit of normal (ULN) occurred in 4.7% (35/750) of WEGOVY-treated patients compared with 1.3% (5/374) of placebo-treated patients. The clinical significance of elevations in lipase or amylase with WEGOVY is unknown in the absence of other signs and symptoms of pancreatitis.

Liver Tests

In a pediatric clinical trial for weight reduction, increases in alanine aminotransferase (ALT) greater than or equal to 5 times the ULN were observed in 4 (3%) WEGOVY-treated patients compared with 0% of placebo-treated patients. In some patients, increases in ALT and AST were associated with other confounding factors (such as gallstones). In the CV outcomes trial in adults, increases in total bilirubin greater than or equal to 3 times the ULN were observed in 0.3% (30/8,585) of WEGOVY-treated patients versus 0.2% (14/8,579) of placebo-treated patients.

Postmarketing Experience

The following adverse reactions have been reported during post-approval use of semaglutide, the active ingredient of WEGOVY. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure.

Gastrointestinal Disorders: acute pancreatitis and necrotizing pancreatitis, sometimes resulting in death; ileus, intestinal obstruction, severe constipation including fecal impaction

Hypersensitivity: anaphylaxis, angioedema, rash, urticaria

Pulmonary: Pulmonary aspiration has occurred in patients receiving GLP-1 receptor agonists undergoing elective surgeries or procedures requiring general anesthesia or deep sedation

Renal and Urinary Disorders: acute kidney injury

Source: Wegovy prescribing information (FDA label on DailyMed), revised 2026-06-18

Updated automatically

What changed for Semaglutide

Written from each source's own record as it changes. Every change on GLPcompare

Not from trials

What people have reported to FDA about Wegovy

25,993 reports name Wegovy, 11,521 of them marked serious, in FDA's file of Oct 28, 2026. Anyone can file a report and a report names every medicine the person took, so these counts cannot show that Wegovy caused a problem or how often it happens. For how often, use the trial rates above.

Symptoms reported most

  • Nausea3,474
  • Vomiting2,198
  • Diarrhea1,380
  • Less weight loss than expected1,284
  • Weight increased1,276
  • Constipation1,251
  • Fatigue1,116
  • Headache921
  • Hunger841
  • Dizziness818
  • Upper abdominal pain770
  • Decreased appetite770

Pen, dose and use problems reported most

  • Off label use1,327
  • Drug ineffective1,131
  • Device malfunction1,041
  • Device leakage953
  • Inappropriate schedule of product administration724
  • Product dose omission issue511
  • Wrong technique in product usage process500
  • Product use issue453
  • Product use in unapproved indication364
  • Incorrect dose administered by device320
  • Product communication issue255

Counted through openFDA from FDA's Adverse Event Reporting System. One report can list several problems.

Questions

Wegovy side effects: common questions

What are the most common side effects of Wegovy?

In Wegovy's FDA label (revised Jun 18, 2026), the most common side effects at 2.4 mg were nausea (44% vs 16% on placebo), diarrhea (30% vs 16%) and vomiting (24% vs 6%). These come from FDA's table of placebo-controlled trials (Table 3. Adverse Reactions (≥2% and Greater Than Placebo) in WEGOVY 2.4 mg Injection-treated Adults with Obesity or Overweight for Weight Reduction).

Does Wegovy cause hair loss?

In its FDA label, 3% of people taking Wegovy at 2.4 mg reported hair loss, against 1% on placebo.

Does Wegovy cause acid reflux?

In its FDA label, 5% of people taking Wegovy at 2.4 mg reported acid reflux, against 3% on placebo.

Does Wegovy cause fatigue?

In its FDA label, 11% of people taking Wegovy at 2.4 mg reported fatigue, against 5% on placebo.

Does Wegovy cause headaches?

In its FDA label, 14% of people taking Wegovy at 2.4 mg reported headaches, against 10% on placebo.

Does Wegovy cause dizziness?

In its FDA label, 8% of people taking Wegovy at 2.4 mg reported dizziness, against 4% on placebo.

Does Wegovy cause constipation?

In its FDA label, 24% of people taking Wegovy at 2.4 mg reported constipation, against 11% on placebo.

Does Wegovy cause gas?

In its FDA label, 6% of people taking Wegovy at 2.4 mg reported gas, against 4% on placebo.

What serious side effects does the Wegovy label warn about?

Its Warnings and Precautions section covers Risk of Thyroid C-Cell Tumors; Acute Pancreatitis; Acute Gallbladder Disease; Hypoglycemia; Acute Kidney Injury Due to Volume Depletion; Severe Gastrointestinal Adverse Reactions; Hypersensitivity Reactions; Diabetic Retinopathy Complications in Patients with Type 2 Diabetes; Heart Rate Increase; Pulmonary Aspiration During General Anesthesia or Deep Sedation; and Never Share WEGOVY FlexTouch Between Patients.

Does Wegovy have a boxed warning?

Yes. In rodents, semaglutide causes dose-dependent and treatment-duration-dependent thyroid C-cell tumors at clinically relevant exposures. It is unknown whether WEGOVY causes thyroid C-cell tumors, including medullary thyroid carcinoma (MTC), in humans as human relevance of semaglutide-induced rodent thyroid C-cell tumors has not been determined [see Warnings and Precautions ( 5.1 ), Nonclinical Toxicology ( 13.1 )]....

Can you take Wegovy while pregnant?

Based on animal reproduction studies, there may be potential risks to the fetus from exposure to semaglutide during pregnancy. Discontinue WEGOVY in pregnant patients who are using it for weight reduction (see Clinical Considerations ).

Can you take Wegovy while breastfeeding?

Data from a clinical lactation study with semaglutide oral tablet formulation reported semaglutide concentrations below the lower limit of quantification in human milk.

Should you stop Wegovy before surgery?

Available data are insufficient to inform recommendations to mitigate the risk of pulmonary aspiration during general anesthesia or deep sedation in patients taking WEGOVY, including whether modifying preoperative fasting recommendations or temporarily discontinuing WEGOVY could reduce the incidence of retained gastric contents.

Does Wegovy cause withdrawal symptoms?

The warnings and side effect sections of its FDA label do not list any. What trials do show after people stop a GLP-1 is weight coming back. What happens when you stop a GLP-1

Who should not take Wegovy?

WEGOVY is contraindicated in the following conditions: a personal or family history of MTC or in patients with MEN 2. a prior serious hypersensitivity reaction to semaglutide or to any of the excipients in WEGOVY injection or WEGOVY tablet. Serious hypersensitivity reactions, including anaphylaxis and angioedema, have been reported with WEGOVY.

How many side effect reports has FDA received about Wegovy?

FDA's adverse event system holds 25,993 reports that name Wegovy, 11,521 of them marked serious. The most reported symptoms are nausea, vomiting, diarrhea. Anyone can file a report and a report names every medicine the person took, so these cannot show that Wegovy caused a problem or how often it happens. The trial rates in its label do that.

Trial rates describe groups, not what one person will feel. Talk to your clinician before starting, stopping or changing a medicine. Label revised Jun 18, 2026.

GLPcompare is an informational data platform, not a medical provider or pharmacy. Nothing here is medical advice, a diagnosis, or a recommendation to start, stop, or change any treatment. Data is aggregated from public sources and can be incomplete or out of date. Always confirm with a licensed clinician and the current FDA label.