I begge disse sammenlignende kontrollerede (ikke placebokontrollerede) kliniske undersøgelser af hjerteinsufficienspatienter tåltes losartan generelt bedre end captopril målt ved en signifikant lavere incidens af seponering på grund af bivirkninger og en signifikant lavere incidens af hoste.
In both comparator-controlled (not placebo-controlled) clinical studies on patients with heart failure the tolerability of Losartan was superior to that of captopril, measured on the basis of a significantly lower rate of discontinuations of therapy on account of adverse events and a significantly lower frequency of cough.