When to seek immediate medical attention: Severe abdominal pain that doesn't resolve, possibly radiating to the back (potential pancreatitis) Persistent nausea and vomiting preventing adequate fluid intake (dehydration risk) Signs of allergic reaction: difficulty breathing, swelling of face or throat, severe rash Symptoms of thyroid tumors: lump in neck, hoarseness, difficulty swallowing (rare but serious) Severe hypoglycemia symptoms when used with insulin or sulfonylureas: confusion, seizures, loss of consciousness Changes in vision or eye pain (potential diabetic retinopathy complications, particularly with rapid improvement in blood glucose) Signs of kidney problems: decreased urination, swelling in legs or feet, unusual fatigue Symptoms of gallbladder problems: pain in right or middle upper abdomen, fever, yellowing of skin/eyes These medications carry a boxed warning regarding the risk of thyroid C-cell tumors, based on animal studies

10.1042/bst20140028 43 ShopitA.NiuM.WangH.TangZ.LiX.TesfaldetT.et al (2020)
Lancet 378 , 595605 (2011)
These outcomes are not caused by the medication directly attacking teeth