Hydroxyzine, whose brand names include Atarax and Vistaril, and Benadryl, the brand name of diphenhydramine, are both first-generation sedating antihistamines. Since they are in the same drug ...

Chlorpheniramine (Chlor-Trimeton) 4 mg tid; comes in 4-mg tablets or 8-mg time-release tablets Antihistamine Hydroxyzine (Vistaril) 25-50 mg/day comes in 25 or 50 mg tablets Antihistamine ...