StacksVerified U.S. regulatory reference

21 CFR §338.10

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
The active ingredient of the product consists of any of the following when used within the dosage limits established for each ingredient in § 338.50(d):
  1. (a)Diphenhydramine hydrochloride.
  2. (b)Diphenhydramine citrate.