[Comparative study on clinical effectiveness of mecillinam and pivmecillinam versus ampicillin in acute urinary infections (author's transl)].

30 outpatients suffering from acute urinary infections underwent oral treatment with pivaloyloxymethyl-(2S,5R,6R)-6-(perhydroazepin-1-ylmethylenamino)penicillinate (pivmecillinam) (n = 15) or ampicillin (n = 15) in a first study. In a second study 6-beta-(hexahydro-1H-azepin-1-yl)-methylenamino penicillanic acid (mecillinam) (n = 16) or ampicillin (n = 14) were applied i.v. to 30 patients with pretreated urinary infections. The tolerance of the drugs proved to be comparatively good in both studies. The clinical and antibacterial effectiveness were equally good in the first study. However, in the second study the effectiveness of mecillinam However, in the second study the effectiveness of mecillinam seemed to be comparatively inferior.