We measured fungicidal activity of continuous infusion of amphotericin B deoxycholate plus 5′flucytosine using quantitative cultures of cerebrospinal fluid (CSF) obtained from lumbar punctures of human immunodeficiency virus (HIV)–infected patients with neurocryptococcosis during 14 days of treatment. Glomerular renal function was preserved in all patients. Mycological efficacy with progressive reduction in CSF cryptococcal colony‐forming units was comparable to standard 4‐h infusion of amphotericin B.