CheckVegan

Is Diphenhydramine Hydrochloride vegetarian?

Diphenhydramine Hydrochloride

Vegetarian Vegetarian
Vegan Vegan

Diphenhydramine hydrochloride is the hydrochloride salt of diphenhydramine, a synthetic first-generation antihistamine sold under the brand name Benadryl, used to treat allergies, insomnia, and cold symptoms.

Also known as Benadryl (HCl)
INCI name Diphenhydramine Hydrochloride
CAS number 147-24-0
EC number 205-687-2
CosIng ID 81243
Last reviewed 10 July 2026

An ingredient is considered vegetarian if it avoids components derived from killing an animal.

Classifications are made to the best of our knowledge based on available scientific and regulatory sources. We cannot guarantee the accuracy of every entry, errors in the sources we draw from can always occur. This tool also cannot account for cross-contamination, which depends entirely on individual suppliers and producers. If you believe a classification is incorrect, you can report an issue.

Report an issue