“…If the use of an ACE inhibitor is continued after an incident, the rate of recurrent angioedema increases to 187 per 1,000 person–years, with, on average, 11 months to recurrence, according to a study covering 51,752 person–years of ACE inhibitor use 28 . After drug withdrawal, the tendency to develop angioedema usually abates but may persist for months or even years 29 , 30 . It is difficult to rationalize how such episodes can occur after stopping the ACE inhibitor, and indeed this is not in accordance with the usual criteria for causality assessment for acutely occurring ADRs.…”