21 C.F.R. § 336.10 Antiemetic active ingredients.
The active ingredient of the product consists of any of the following when used within the dosage limits established for each ingredient in § 336.50(d):
(a) Cyclizine hydrochloride.
(b) Dimenhydrinate.
(c) Diphenhydramine hydrochloride.
(d) Meclizine hydrochloride.