  chlorphenamine (inn) or chlorpheniramine (usan, former ban), commonly marketed in the form of chlorpheniramine maleate (chlorphen-12), is a first-generation alkylamine antihistamine used in the prevention of the symptoms of allergic conditions such as rhinitis and urticaria. its sedative effects are relatively weak compared to other first-generation antihistamines. chlorphenamine is one of the most commonly used antihistamines in small-animal veterinary practice. although not generally approved as an antidepressant or anti-anxiety medication, chlorphenamine appears to have these properties as well.{{cite web|last=carlsson, arvid; lindqvist, margit|title=central and peripheral monoaminergic membrane-pum
H1_receptor_antagonists Organochlorides Pyridines Serotonin-norepinephrine_reuptake_inhibitors World_Health_Organization_essential_medicines