Levitra, one of two new rivals to anti-impotence pill Viagra, gives men a 12-hour window for sexual intercourseand takes as little as 15 minutes to work, according to a clinical study released on Thursday.
Levitra, one of two new rivals to anti-impotence pill Viagra, gives men a 12-hour window for sexual intercourseand takes as little as 15 minutes to work, according to a clinical study released on Thursday.