Is Dulaglutide safe?
Large trials; boxed thyroid warning
Gut effects dominate. They include nausea, diarrhea, vomiting and belly pain, and they are worst in the first weeks. The label has a boxed warning about thyroid C-cell tumors seen in rodents. People with a personal or family history of medullary thyroid carcinoma or MEN 2 must not take it. Other warnings cover pancreatitis, gallbladder disease, acute kidney injury from dehydration and diabetic retinopathy complications. Hypoglycemia is also a risk when it is combined with insulin or sulfonylureas. 1
In REWIND, serious adverse events were no more frequent on dulaglutide than on placebo over five years. This is the longest controlled safety follow-up for the drug. 3
Nausea and other gut effects are common. The serious warnings are pancreatitis, gallbladder disease, kidney injury from dehydration and worse diabetic retinopathy. The boxed warning comes from a thyroid tumor signal in rodents. 1
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More on Dulaglutide
Citations
- FDA 2026: Trulicity (dulaglutide) prescribing information accessdata.fda.gov
- Nauck 2014, Diabetes Care: dulaglutide versus sitagliptin after 52 weeks (AWARD-5) doi.org
- Gerstein 2019, Lancet: dulaglutide and cardiovascular outcomes in type 2 diabetes (REWIND) doi.org
- Adly 2026, Diabetologia: dulaglutide versus insulin in adolescents with thalassaemia-induced diabetes (DIADEMA) pubmed.ncbi.nlm.nih.gov
Reference information only, not medical advice. Drawn from the Dulaglutide article, fact-checked against the cited sources. No dosing anywhere on this site.