Head-to-head comparisons of medication uses, side effects, warnings, and more.
Key takeaways
Januvia (sitagliptin) and Glucotrol XL (glipizide) are both oral medications used to treat Type 2 diabetes, but they belong to different medication classes. Januvia is a dipeptidyl peptidase-4 (DPP-4) inhibitor, while Glucotrol XL is a sulfonylurea. Januvia is typically taken once daily and works by increasing insulin levels in your body and reducing sugar production. Glucotrol XL is taken once or twice daily and works by stimulating your pancreas to release more insulin. Januvia does not typically cause significant weight changes, whereas Glucotrol XL can lead to weight gain. Common side effects of Januvia include a runny nose and sore throat, while Glucotrol XL may cause dizziness and diarrhea. Both medications can cause low blood sugar, especially when taken with other diabetes medications, but Glucotrol XL has a higher risk of causing dangerously low blood sugar levels.
Januvia (sitagliptin)
Glipizide
Januvia (sitagliptin)
Glipizide
Summary of Januvia vs. Glipizide
Summary for DDP-4 inhibitor
Prescription only
Januvia (sitagliptin) is a prescription medication that helps lower blood sugar in adults with Type 2 diabetes. It works best when you also follow a balanced diet and exercise regularly. It belongs to the drug class called dipeptidyl peptidase-4 (DPP-4) inhibitors, or gliptins. Januvia (sitagliptin) comes as a tablet you take by mouth once a day. Side effects include stuffy or runny nose and headache. Januvia (sitagliptin) is a brand-name medication only; the generic version isn't available yet.
Summary for Sulfonylurea
Prescription only
Glipizide is a sulfonylurea medication used to treat Type 2 diabetes in adults. It lowers blood sugar levels by telling your pancreas to release more insulin. Glipizide is taken by mouth, typically once or twice daily. Some side effects of this medication include dizziness and diarrhea. Taking glipizide can also put you at risk for dangerously low blood sugar, so it's important to take this medication with meals.