Single-dose treatment of acute urinary tract infection: a controlled trial.

are relieved. Though a seven-day course of treatment with a number of antimicrobial agents will eradicate most infections, the relief of symptoms and return to normal activities results in some patients not completing the full course. This leads to a number of infections persisting in an asymptomatic form. Sulphormethoxine (Fanasil) is a sulphonamide with a halflife in the body of about 150-200 hours (Haegi, 1966), and if therefore a seven-day course is required a single-dose treatment is feasible. We have carried out a trial to compare this treatment with