Head-to-head comparisons of medication uses, side effects, warnings, and more.
Key takeaways
Januvia (sitagliptin) and Rybelsus (semaglutide) are both medications used to treat Type 2 diabetes, but they belong to different drug classes. Januvia is a dipeptidyl peptidase-4 (DPP-4) inhibitor, while Rybelsus is a glucagon-like peptide-1 (GLP-1) receptor agonist. Januvia is taken as a 100 mg tablet once daily, whereas Rybelsus starts at 3 mg daily and can be increased to 7 mg or 14 mg daily. Januvia is available as a brand-name and generic medication, but Rybelsus is only available as a brand-name medication. Common side effects of Januvia include a runny nose and headache, while Rybelsus can cause nausea, vomiting, and diarrhea. Rybelsus has a warning for thyroid cancer, and Januvia does not. Both medications can cause low blood sugar, especially when taken with other diabetes medications. However, Rybelsus should be taken on an empty stomach, while Januvia can be taken with or without food.
Januvia (sitagliptin)
Rybelsus (semaglutide)
Januvia (sitagliptin)
Rybelsus (semaglutide)
Summary of Januvia vs. Rybelsus
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 GLP-1 agonist
Prescription only
Rybelsus (semaglutide) is a brand-name GLP-1 agonist that helps lower blood sugar in adults with Type 2 diabetes. It's also FDA approved to help reduce the risk of heart attack, stroke, and heart-related death in people with Type 2 diabetes who are at risk for these events. The medication comes as a pill that's taken by mouth once a day, at least 30 minutes before you eat, drink, or take any other medications by mouth. It’s used along with diet and exercise, and might also help with weight loss. Common side effects include nausea, stomach pain, and diarrhea.