Appraisal of a new anti-allergy compound. The "double-blind, double-cross" technique.
D018926:Anti-Allergic Agents; D001249:Asthma / Q000628:therapy*; D004311:Double-Blind Method; D004809:Ephedrine / Q000628:therapy*; D006634:Histamine H1 Antagonists / Q000628:therapy*
D018926:Anti-Allergic Agents; D006634:Histamine H1 Antagonists; D004809:Ephedrine
ANTIHISTAMINICS/therapy; ASTHMA/therapy; EPHEDRINE/therapy