Losartan (Cozar) and Impotence
Many commonly used antihypertensive drugs such as diuretics and beta-blockers can interfere with sexual function in both sexes, causing loss of libido, impairment of erectile function and ejaculation in men, and delay or prevent orgasm in women. <after this study>It is therefore concluded that losartan may have an advantage in preservation of sexual function when used clinically for the treatment of hypertensive disorders.
http://www.online.karger.com/library/karger/renderer/dataset.exe?jcode=PHA&action=render&rendertype=abstract&uid=PHA.pha58132.