This is a report on a clinical trial in which cefuroxime was used for treating 110 men with uncomplicated urethral gonorrhoea. Twenty-three men were given 1 g cefuroxime intramuscularly and 1 g probenecid orally, and 87 were treated with 1.5 g cefuroxime intramuscularly with 1 g probenecid orally. All 18 patients treated with 1 g cefuroxime and 1 g probenecid and seen at least once after treatment, were cured. Sixty-six (98.5%) of 67 patients treated with 1.5 g cefuroxime and 1 g probenecid and seen at least once after treatment, were cured. No side effects were reported. The high cure rates compared favourably with other antibiotics now in regular use and cefuroxime should be of great value especially for patients infected with beta-lactamase producing gonococci.