title: Clenbuterol ("Spiropent'): a long-acting bronchodilator.
abstract: Clenbuterol was compared to an aminophylline preparation in a double-blind crossover trial involving 47 patients with asthma and reversible airways obstruction. Following a 2-week control period, each drug was given for a 4-week period. The patients made daily records of the severity of symptoms and recorded PEFR morning and night. Both drugs produced a highly significant reduction in severity and duration of wheeze by day during the first 4 weeks, but only clenbuterol produced further significant reduction in these symptoms during the second 4 weeks. Only clenbuterol produced a significant reduction in the severity of wheeze at night. When clenbuterol was given first there was a significant increase in the mean PEFR both night and morning but no other significant changes with either drug at other periods. Combining the results from the two treatment groups showed a significant difference between them in favour of clenbuterol in respect of duration of daytime wheeze only (p less than 0.05).
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000628:Aminophylline / Q000009:adverse effects / Q000627:therapeutic use; D001249:Asthma / Q000188:drug therapy*; D002976:Clenbuterol / Q000009:adverse effects / Q000627:therapeutic use*; D002986:Clinical Trials as Topic; D004311:Double-Blind Method; D004983:Ethanolamines / Q000627:therapeutic use*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged
chemical_list: D004983:Ethanolamines; D000628:Aminophylline; D002976:Clenbuterol