FDA Ozempic Reports Reach 51,186 Cases
A total of 51,186 adverse event reports for Ozempic have been submitted to federal regulators, according to FDA data from November 2026.
This figure includes 24,642 serious cases and 718 deaths reported to the U.S. Food and Drug Administration.
Federal records show gastrointestinal disorders remain the most frequently logged category. Patients most commonly experience nausea, alongside diarrhea and constipation.
Semaglutide Trial Doses Cause Varying Nausea Rates
Clinical trials for Type 2 diabetes treatments tested varying amounts of semaglutide against a placebo group.
Trial data indicates that 15.8% of patients receiving a 0.5 mg dose reported nausea, compared to 20.3% of those taking a 1 mg dose. Other common clinical trial side effects included diarrhea at 8.5%, abdominal pain at 7.3%, constipation at 5%, and vomiting at 5%.
Semaglutide Links to Sudden Vision Loss and Other Complications
Researchers published a study in JAMA Ophthalmology linking semaglutide medications to non-arteritic anterior ischemic optic neuropathy, a condition causing sudden vision loss. The U.S. Food and Drug Administration subsequently required a warning label for this optic condition in November 2026.
“There's essentially no warning signs. It's just a very sudden loss of vision,” attorney Ellen Relkin, a partner and the chair of the defective drugs and devices practice group at Weitz & Luxenberg, said.
Serious complications also involve acute gallbladder disease, acute kidney injury, allergic reactions, and diabetic retinopathy. Federal monitoring systems also captured 659 reports of alopecia and 389 reports of suicidal ideation by May 2026.
Medications Increase Risks of Gastroparesis and Bowel Obstruction
Delayed stomach emptying can lead to gastroparesis, a condition where the stomach fails to empty its contents properly. A 2023 study published in JAMA noted an increased risk of bowel obstruction among users of these medications compared to alternative treatments.
“There are some publicly available clinical trials, observational studies and case reports showing an association between gastroparesis or persistent vomiting and Ozempic and these types of drugs,” Jonathan Sedgh, an attorney with Morgan & Morgan, said.
Federal Adverse Event Monitoring System figures from May 2026 recorded 3,168 reports of impaired gastric emptying and 1,003 reports of intestinal obstruction.
Regulatory Label Updates
Federal health officials updated warning labels multiple times to reflect emerging safety data. An October 2025 label revision highlighted severe pancreas risks and stated the drug is not recommended for patients with severe gastroparesis.
A January 2025 update added warnings regarding acute kidney injury linked to dehydration. Another update in November 2024 cautioned that slowed stomach emptying can increase aspiration risks during surgical procedures involving anesthesia.
Common Questions About Ozempic Side Effects
What are the worst side effects of Ozempic?
Severe complications include pancreatitis, gastroparesis, acute kidney injury, severe allergic reactions, and thyroid tumors. The U.S. Food and Drug Administration maintains a boxed warning for thyroid C-cell tumors.
Can Ozempic cause permanent vision loss?
Studies published in JAMA Ophthalmology linked semaglutide use to NAION, a rare condition that disrupts blood flow to the optic nerve.
What gastrointestinal issues are most common?
Nausea affects roughly 15% to 20% of patients depending on the dosage level. Diarrhea, vomiting, and constipation frequently occur during dose escalation phases.
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