diphenhydramine (Benadryl)

clemastine (Tavist)

dimenhydrinate (Dramamine)

trimethobenzamide HCL (Arrestin, Benzacot, Tigan, others)

First generation antihistamines—

Traditional antihistamines (Ethanolamines)

There is no prototype for this classification

brompheniramine (Dimetane)

chlorpheniramine (Chlor-Trimeton)

dexchlorpheniramine (Polaramine)

(Alkylamines)

There is no prototype for this classification

tripelennamine (Pyribenzamine)

(Ethylenediamines)

There is no prototype for this classification

buclizine (Bucladin-S)

meclizine (Antivert)

cyclizine (marezine)

promethazine (Phenergan)

trimeprazine (Temaril)

(Phenothiazines)

There is no prototype for this classification

azatadine (Optimine)

cyproheptadine (Periactin)

hydroxyzine (Atarax, Vistaril, others)

(Piperidines)

loratadine (Claritin)

azelastine (Astelin)

cetirizine (Zyrtec)

desloratadine (Clarinex)

fexofenadine (Allegra)

Second generation antihistamines—

Nonsedating antihistamines