Wiktionary
dexchlorpheniramine
n. An antihistamine used to treat allergic conditions such as hay fever and urticaria.
Wikipedia
Dexchlorpheniramine
Dexchlorpheniramine (trade name Polaramine) is an antihistamine with anticholinergic properties used to treat allergic conditions such as hay fever or urticaria. It is the pharmacologically active dextrorotatory isomer of chlorpheniramine.