Ciprofloxacin in acute male gonorrhea.

100 male adults suffering from acute gonococcal urethritis were hospitalised and treated with decreasing doses from 2000 mg to 100 mg of ciprofloxacin (1-cyclopropyl-6-fluoro-1,4-dihydro-4-oxo-7-(1-piperazinyl)-3-quinoline carboxylic acid, Bay o 9867; designated tradename: Ciprobay). Clinical signs (burning, exudate, edema, inflammation) and bacteriology (native and culture) were assessed hourly during the first 9 h and at 12, 24 and 72 h after start of therapy. Most patients were controlled during 10 days. 99 patients showed clinical and bacteriological cure. One patient with subacute gonococcal urethritis (protocol violation) did not react on 250 mg. No postgonococcal urethritis was seen. No side effects were reported. For the acute male gonococcal urethritis a 100 mg single dose treatment with ciprofloxacin can be recommended.