Famotidine vs Dapoxetine: side-by-side comparison
Famotidine (H2-receptor antagonist) and Dapoxetine (Short-acting SSRI (premature ejaculation)) 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 | Dapoxetine |
|---|---|---|
| Therapeutic class | H2-receptor antagonist | Short-acting SSRI (premature ejaculation) |
| CAS | 76824-35-6 | 129938-20-1 |
| ATC | A02BA03 | G04BX14 |
| Molecular weight | 337.45 g/mol | 305.4 g/mol |
| Brands with this active ingredient | 1 | 1 |
What they share
Famotidine and Dapoxetine 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 Dapoxetine, 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: Famotidine reversibly and competitively blocks histamine H2 receptors on gastric parietal cells, reducing both basal and stimulated gastric acid secretion. Dapoxetine: Dapoxetine selectively blocks the serotonin transporter on the presynaptic neuron, increasing serotonin concentration in the synaptic cleft.
Indications compared
Famotidine: Famotidine is approved in adults and children for short-term treatment of active duodenal and gastric ulcer, maintenance therapy of duodenal ulcer, gastro-oesophageal reflux disease, Zollinger-Ellison syndrome and other… Dapoxetine: Dapoxetine is approved in many European, Asian and Latin American countries for the on-demand treatment of premature ejaculation in adult men aged 18 to 64 years with a confirmed diagnosis.
Safety profile
Famotidine: Famotidine is generally well tolerated. Dapoxetine: Common adverse effects include nausea, dizziness, headache, diarrhoea, insomnia and fatigue, particularly during the first doses.
Frequently asked questions
Is Famotidine better than Dapoxetine? ▾
Famotidine and Dapoxetine are not "better or worse" — they treat different things. The sensible question is which fits your specific need.
Can Famotidine and Dapoxetine 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 Dapoxetine
The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.