Dutasteride vs Sitagliptin: side-by-side comparison
Dutasteride (Dual 5α-reductase inhibitor (type 1 and type 2)) 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 | Dutasteride | Sitagliptin |
|---|---|---|
| Therapeutic class | Dual 5α-reductase inhibitor (type 1 and type 2) | DPP-4 inhibitor |
| CAS | 164656-23-9 | 486460-32-6 |
| ATC | G04CB02 | A10BH01 |
| Molecular weight | 528.53 g/mol | 407.31 g/mol |
| Brands with this active ingredient | 1 | 1 |
What they share
Dutasteride 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
Dutasteride 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
Dutasteride: Dutasterid hemmt irreversibel beide Isoenzyme der 5α-Reduktase, des Enzyms, das Testosteron zu Dihydrotestosteron (DHT) umwandelt. Sitagliptin: Sitagliptin hemmt reversibel DPP-4, die Serinprotease, die für den schnellen Abbau von Glucagon-like Peptid 1 (GLP-1) und glukoseabhängigem insulinotropen Polypeptid (GIP) verantwortlich ist.
Indications compared
Dutasteride: Dutasterid ist zugelassen bei symptomatischer benigner Prostatahyperplasie, allein oder in Kombination mit Tamsulosin (Combodart/Jalyn) zur stärkeren Symptomlinderung. Sitagliptin: Sitagliptin ist bei Erwachsenen mit Typ-2-Diabetes mellitus, allein oder in Kombination mit anderen antidiabetischen Wirkstoffen, zur Verbesserung der glykämischen Kontrolle zugelassen.
Safety profile
Dutasteride: Häufige Nebenwirkungen sind sexuelle Funktionsstörungen (verminderte Libido, erektile Dysfunktion, Ejakulationsstörungen), Gynäkomastie und Brustspannen. Sitagliptin: Sitagliptin wird im Allgemeinen gut vertragen.
Häufig gestellte Fragen
Is Dutasteride better than Sitagliptin? ▾
Dutasteride and Sitagliptin are not "better or worse" — they treat different things. The sensible question is which fits your specific need.
Can Dutasteride 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 Dutasteride
Products with Sitagliptin
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