title: Effects of nifedipine and indomethacin on cough induced by angiotensin-converting enzyme inhibitors: a double-blind, randomized, cross-over study.
abstract: Prostaglandins (PG) have been suggested to play a role in the genesis of cough induced by angiotensin-converting enzyme inhibitors (ACE-I) and that inhibition of PG synthesis can reduce or abolish the incidence of this side effect. Moreover, experimental and clinical data suggest that nifedipine, a dihydropyridine Ca antagonist, can inhibit PG synthesis. Therefore, we wished to determine whether nifedipine can reduce cough induced by ACE-I as compared with indomethacin, a known inhibitor of PG synthesis. Fourteen hypertensive patients who developed cough during captopril chronic therapy randomly received slow-release nifedipine 20 mg twice daily (b.i.d.), indomethacin 50 mg b.i.d., and placebo b.i.d. for 1 week in a double-blind, cross-over design. At the end of each treatment phase, cough was evaluated by a self-administered questionnaire containing an ordinal scale for daily cough intensity and frequency. Indomethacin abolished or markedly reduced cough induced by ACE-I, whereas nifedipine reduced it but to a lesser degree. These findings suggest that PG can play a role in cough caused by ACE-I, and a dihydropyridine Ca antagonist can reduce the occurrence of this side effect.
authors.affiliation: Department of Internal Medicine and Therapeutics, University of Pavia, Italy.
authors.forename: R
authors.initials: R
authors.lastname: Fogari
authors.forename: A
authors.initials: A
authors.lastname: Zoppi
authors.forename: F
authors.initials: F
authors.lastname: Tettamanti
authors.forename: G D
authors.initials: GD
authors.lastname: Malamani
authors.forename: C
authors.initials: C
authors.lastname: Tinelli
authors.forename: A
authors.initials: A
authors.lastname: Salvetti
mesh_terms: D000328:Adult; D000368:Aged; D000806:Angiotensin-Converting Enzyme Inhibitors / Q000009:adverse effects*; D001794:Blood Pressure / Q000187:drug effects; D002216:Captopril / Q000008:administration & dosage / Q000009:adverse effects*; D003371:Cough / Q000139:chemically induced / Q000188:drug therapy*; D004311:Double-Blind Method; D005260:Female; D006339:Heart Rate / Q000187:drug effects; D006801:Humans; D007213:Indomethacin / Q000008:administration & dosage / Q000627:therapeutic use*; D008297:Male; D008875:Middle Aged; D009543:Nifedipine / Q000008:administration & dosage / Q000627:therapeutic use*; D011453:Prostaglandins / Q000096:biosynthesis
chemical_list: D000806:Angiotensin-Converting Enzyme Inhibitors; D011453:Prostaglandins; D002216:Captopril; D009543:Nifedipine; D007213:Indomethacin