What are common trade names for diphenhydramine?
Diphenhydramine is sold under many brand and store names because the same active ingredient is used across multiple product types (oral tablets/liquid, capsules, and allergy or sleep formulations, plus some topical/other combinations). Common trade names you may see include:
- Benadryl (allergy relief; many countries)
- Nytol (often used for sleep products in some markets)
- Unisom (sleep-aid products in some markets)
Does diphenhydramine show up in combination products too?
Yes. Diphenhydramine is often included in multi-ingredient “cold,” “allergy,” or “night-time” formulas, which can mean the trade name is different from a single-ingredient diphenhydramine product. If you’re matching a product to diphenhydramine, the most reliable approach is to check the active ingredient section for “diphenhydramine” (or its salt form).
How can I identify the exact diphenhydramine product if I only know the brand?
Look for:
- Active ingredient listing that says diphenhydramine (or a diphenhydramine salt).
- The strength (for example, common oral strengths are 25 mg or 50 mg, depending on the product).
- Whether it’s oral (tablet/capsule/liquid) versus other formats.
If you share the brand name and the country (or a photo/text of the “active ingredient” line), I can help confirm whether it is diphenhydramine and what formulation it matches.
Sources
I can’t reliably provide a complete, country-specific list of every diphenhydramine trade name using only the information provided here. If you want, tell me your country (e.g., US, UK, Canada, India) and whether you mean oral allergy/sleep products or topical/combination products, and I’ll narrow to the relevant brands.