title: SCH 434: a new antihistamine/decongestant for seasonal allergic rhinitis.
abstract: In a double-blind, multicenter study, we compared the effects of SCH 434 (Claritin-D; Schering Corp., Kenilworth, N.J.), a new sustained-release, combination antihistamine/decongestant medication, with the effects of its individual components and placebo in 435 patients with seasonal allergic rhinitis. SCH 434 contains 5 mg of loratadine, a nonsedating antihistamine, and 120 mg of pseudoephedrine as the decongestant component. Administered twice daily in this study, SCH 434 effected a 50% decrease in total symptom scores at day 4 and was significantly (p less than or equal to 0.03) more effective than the components alone or the placebo. Loratadine or pseudoephedrine alone, with 43% and 33% decline in symptom scores, respectively, also was more effective than placebo (p less than 0.05). As expected, pseudoephedrine alone was more effective than loratadine (p less than 0.01) in relieving nasal stuffiness; SCH 434 was more effective (p less than or equal to 0.01) than placebo and loratadine in relieving nasal stuffiness. All treatments were safe and well tolerated, although insomnia and dry mouth were noted in a significant number of patients who received either SCH 434 or pseudoephedrine. No serious side effects were noted. The incidence of sedation did not differ significantly among the four treatment groups. We conclude that SCH 434 is a safe and effective treatment for symptoms of seasonal allergic rhinitis. The combination drug (SCH 434) was better than its components for some, but not all, symptoms.
authors: W.C. Service Allergy and Asthma Research Foundation, Colorado Springs, Colo.
authors: W W
authors: WW
authors: Storms
authors: S F
authors: SF
authors: Bodman
authors: R A
authors: RA
authors: Nathan
authors: P
authors: P
authors: Chervinsky
authors: C H
authors: CH
authors: Banov
authors: R J
authors: RJ
authors: Dockhorn
authors: I
authors: I
authors: Jarmoszuk
authors: H J
authors: HJ
authors: Zeitz
authors: S J
authors: SJ
authors: McGeady
authors: J L
authors: JL
authors: Pinnas
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D003533:Cyproheptadine / Q000008:administration & dosage / Q000009:adverse effects / Q000031:analogs & derivatives*; D003692:Delayed-Action Preparations; D004311:Double-Blind Method; D004338:Drug Combinations / Q000008:administration & dosage / Q000009:adverse effects; D004359:Drug Therapy, Combination; D004809:Ephedrine / Q000008:administration & dosage* / Q000009:adverse effects; D005260:Female; D006634:Histamine H1 Antagonists / Q000008:administration & dosage* / Q000009:adverse effects; D006801:Humans; D017336:Loratadine; D008297:Male; D015337:Multicenter Studies as Topic; D014663:Nasal Decongestants / Q000008:administration & dosage* / Q000009:adverse effects; D054199:Pseudoephedrine; D006255:Rhinitis, Allergic, Seasonal / Q000188:drug therapy* / Q000503:physiopathology
chemical_list: D003692:Delayed-Action Preparations; D004338:Drug Combinations; D006634:Histamine H1 Antagonists; D014663:Nasal Decongestants; C060049:Sch 434; D003533:Cyproheptadine; D017336:Loratadine; D054199:Pseudoephedrine; D004809:Ephedrine