OBJECTIVE: To compare the tolerability of angiotensin-converting enzym
e (ACE) inhibitors with that of angiotensin II (AII)-receptor blockers
and the incidence of cough and angioedema associated with their use t
hrough review of published data. DATA SOURCES: References were identif
ied through a MEDLINE search of articles published between January 197
5 and April 1997. Bibliographies of pertinent references were also rev
iewed. RESULTS: Results of placebo-controlled and comparative trials o
f the AII blockers demonstrate that they are at least as effective as
ACE inhibitors for hypertension, but exhibit an incidence of cough and
absent or rare angioedema like that of placebo. CONCLUSIONS: In the 1
0 comparative trials described, all reported a lower incidence of coug
h with AII blockers than with ACE inhibitors. Angioedema was not repor
ted in the comparative trials described.