Pv. Dicpinigaitis et Jb. Dobkin, EFFECT OF ANGIOTENSIN-CONVERTING ENZYME-INHIBITION ON BRONCHIAL RESPONSIVENESS, Journal of clinical pharmacology, 36(4), 1996, pp. 361-364
The effect of angiotensin-converting enzyme (ACE) inhibition on bronch
ial responsiveness has not been clearly established. Because ACE degra
des bradykinin and substance P, inhibition of the enzyme may lead to a
ccumulation of these potent bronchoconstrictors in the lung, potential
ly leading to enhanced bronchial reactivity or bronchospasm. Previous
studies of the effect of ACE inhibition on airway responsiveness have
yielded conflicting results. A randomized, double-blind, placebo-contr
olled study was therefore conducted to evaluate the effect of a 14-day
course of oral lisinopril (10 mg for days 1-3, 20 mg for days 4-14) o
n bronchial responsiveness to inhaled methacholine in a group of healt
hy volunteers. No significant change in methacholine responsiveness oc
curred in any of the participants receiving lisinopril. The mean (+/-
SD) concentration of methacholine producing a decrease in FEV(1) of 20
% from baseline (PC20; mg/mL) was 23.3 +/- 5.0 before the study and 23
.5 +/- 4.5 at the end of the study for the lisinopril group, and 23.0
+/- 4.6 before the study and 21.8 +/- 6.9 after the study for the plac
ebo group. The 14-day course of ACE inhibitor therapy did not enhance
nonspecific bronchial responsiveness in healthy volunteers.