Management of candiduria is limited by the lack of information about its na
tural history and lack of data from controlled studies on the efficacy of t
reating it with antimycotic agents. We compared fungal eradication rates am
ong 316 consecutive candiduric (asymptomatic or minimally symptomatic) hosp
italized patients treated with fluconazole (200 mg) or placebo daily for 14
days. In an intent-to-treat analysis, candiduria cleared by day 14 in 79 (
50%) of 159 receiving fluconazole and 46 (29%) of 157 receiving placebo (P
<.001), with higher eradication rates among patients completing 14 days of
therapy (P <.0001), including 33 (52%) of 64 catheterized and 42 (78%) of 5
4 noncatheterized patients. Pretreatment serum creatinine levels were inver
sely related to candiduria eradication. Fluconazole initially produced high
eradication rates, but cultures at 2 weeks revealed similar candiduria rat
es among treated and untreated patients. Oral fluconazole was safe and effe
ctive for short-term eradication of candiduria, especially following cathet
er removal. Long-term eradication rates were disappointing and not associat
ed with clinical benefit.