Famotidine vs Mirtazapine: side-by-side comparison
Famotidine (H2-receptor antagonist) and Mirtazapine (Atypical antidepressant (NaSSA)) 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 | Famotidine | Mirtazapine |
|---|---|---|
| Therapeutic class | H2-receptor antagonist | Atypical antidepressant (NaSSA) |
| CAS | 76824-35-6 | 85650-52-8 |
| ATC | A02BA03 | N06AX11 |
| Molecular weight | 337.45 g/mol | 265.36 g/mol |
| Brands with this active ingredient | 1 | 1 |
What they share
Famotidine and Mirtazapine 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
Famotidine acts by a different mechanism than Mirtazapine, 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
Famotidine: Famotidin blockiert reversibel und kompetitiv Histamin-H2-Rezeptoren an den Belegzellen des Magens und reduziert sowohl die basale als auch die stimulierte Magensäuresekretion. Mirtazapine: Mirtazapin antagonisiert präsynaptische α2-adrenerge Auto- und Heterorezeptoren und steigert so die Freisetzung von Noradrenalin und Serotonin.
Indications compared
Famotidine: Famotidin ist bei Erwachsenen und Kindern zur Kurzzeitbehandlung des aktiven Duodenal- und Magenulkus, zur Erhaltungstherapie des Duodenalulkus, bei gastroösophagealer Refluxkrankheit, beim Zollinger-Ellison-Syndrom und… Mirtazapine: Mirtazapin ist zur Behandlung der schweren depressiven Episode zugelassen.
Safety profile
Famotidine: Famotidin wird im Allgemeinen gut vertragen. Mirtazapine: Häufige unerwünschte Wirkungen sind Sedierung (am stärksten in niedrigen Dosen 7,5–15 mg, paradoxerweise schwächer in höheren Dosen), gesteigerter Appetit, Gewichtszunahme, Mundtrockenheit und Schwindel.
Häufig gestellte Fragen
Is Famotidine better than Mirtazapine? ▾
Famotidine and Mirtazapine are not "better or worse" — they treat different things. The sensible question is which fits your specific need.
Can Famotidine and Mirtazapine 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 Famotidine
Products with Mirtazapine
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