CFR › Title 21 › Part 349 › §349.1821 CFR §349.18Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy linkThe active ingredient of the product consists of one of the following, within the established concentration for each ingredient:(a)Ephedrine hydrochloride, 0.123 percent.(b)Naphazoline hydrochloride, 0.01 to 0.03 percent.(c)Phenylephrine hydrochloride, 0.08 to 0.2 percent.(d)Tetrahydrozoline hydrochloride, 0.01 to 0.05 percent.