Dulaglutide vs Sitagliptin: side-by-side comparison
Dulaglutide (GLP-1 receptor agonist) and Sitagliptin (DPP-4 inhibitor) belong to different therapeutic classes and are rarely substitutes for each other. The comparison is useful when a single patient is weighing both options for adjacent or overlapping needs.
| Property | Dulaglutide | Sitagliptin |
|---|---|---|
| Therapeutic class | GLP-1 receptor agonist | DPP-4 inhibitor |
| CAS | 923950-08-7 | 486460-32-6 |
| ATC | A10BJ05 | A10BH01 |
| Molecular weight | ~63 kDa | 407.31 g/mol |
| Brands with this active ingredient | 1 | 1 |
What they share
Dulaglutide and Sitagliptin share the common regulatory framework for prescription active ingredients, bioequivalence standards for generics, and pharmacist oversight. Beyond that, points in common are limited.
Key differences
Dulaglutide acts by a different mechanism than Sitagliptin, with indications that barely overlap. Comparing the two is useful when a clinician has mentioned both in the same context or the patient wants to understand why one was prescribed instead of the other.
Mechanisms compared
Dulaglutide: Dulaglutide activates the GLP-1 receptor in pancreatic beta cells, stimulating glucose-dependent insulin secretion and suppressing inappropriate glucagon release from alpha cells. Sitagliptin: Sitagliptin reversibly inhibits DPP-4, the serine protease responsible for rapid degradation of glucagon-like peptide 1 (GLP-1) and glucose-dependent insulinotropic polypeptide (GIP).
Indications compared
Dulaglutide: The medication is approved in adults with type 2 diabetes mellitus, as monotherapy when metformin is inappropriate or as add-on therapy to other antidiabetics, to improve glycaemic control. Sitagliptin: Sitagliptin is approved in adults with type 2 diabetes mellitus, alone or in combination with other antidiabetic agents, to improve glycaemic control.
Safety profile
Dulaglutide: The most common adverse effects are gastrointestinal: nausea, diarrhoea, vomiting and abdominal pain, usually mild to moderate and decreasing over the first weeks of treatment. Sitagliptin: Sitagliptin is generally well tolerated.
Frequently asked questions
Is Dulaglutide better than Sitagliptin? ▾
Dulaglutide and Sitagliptin are not "better or worse" — they treat different things. The sensible question is which fits your specific need.
Can Dulaglutide and Sitagliptin be combined? ▾
Whether they can be combined depends on the indications and the interaction profile of each. If both are in a single prescription, the prescriber has weighed it; in self-medication they should never be combined.
Do they have the same side-effect profile? ▾
No — they belong to different classes and have distinct side-effect profiles. Each has its own prescribing information.
Products with Dulaglutide
Products with Sitagliptin
The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.