Present day use of the antihistamines with special references to the use of chlorcyclizine hydrochloride.
D006633:Histamine Antagonists; D006634:Histamine H1 Antagonists / Q000627:therapeutic use*; D006801:Humans; D010879:Piperazines; D006255:Rhinitis, Allergic, Seasonal / Q000628:therapy*
D006633:Histamine Antagonists; D006634:Histamine H1 Antagonists; D010879:Piperazines; C084597:chlorcyclizine
ANTIHISTAMINICS/therapeutic use; HAY FEVER/therapy