DIPHENHYDRAMINE HCL (ALLERGY RELIEF) TABLET [SERGEANT'S PET CARE PRODUCTS, INC.] Home DIPHENHYDRAMINE HCL (ALLERGY RELIEF) TABLET [SERGEANT'S PET CARE PRODUCTS, INC.] DIPHENHYDRAMINE HCL (ALLERGY RELIEF) TABLET [SERGEANT'S PET CARE PRODUCTS, INC.] PDF | XML NDC 21091-904-01 Set ID cce81932-f9a6-4c98-a130-b9e83347d99a Generic Name Product Class Product Number Application Number Related Drugs Search DailyMed Drugs