title: Clinical studies of terfenadine in seasonal allergic rhinitis.
abstract: alpha-[4-(1,1-Dimethylethyl)phenyl]-4-(hydroxydiphenylmethyl)-1- piperidinebutanol (terfenadine, RMI 9918, Triludan, Teldane, resp.) was evaluated in groups of at least 30 patients per drug for relief of symptoms of active allergic pollinosis on a double-blind basis during the pollen season for 3 successive years. Terfenadine 20 mg 3 times a day was as effective as chlorpheniramine maleate 4 mg 3 times a day. In each study chlorpheniramine consistently showed a higher incidence of sedation than placebo. None of the terfenadine dosage schedules up to 200 mg 3 times a day caused sedation significantly different from that of placebo or efficacy greater than that seen with 20 mg 3 times a day. The incidence of central nervous system stimulation in the terfenadine group was also not different from that of placebo.
mesh_terms: D001559:Benzhydryl Compounds / Q000009:adverse effects / Q000627:therapeutic use*; D004311:Double-Blind Method; D006634:Histamine H1 Antagonists / Q000009:adverse effects / Q000627:therapeutic use*; D006801:Humans; D006255:Rhinitis, Allergic, Seasonal / Q000188:drug therapy*; D012621:Seasons; D016593:Terfenadine
chemical_list: D001559:Benzhydryl Compounds; D006634:Histamine H1 Antagonists; D016593:Terfenadine