Oral Miltefosine for Indian Visceral Leishmaniasis
Shyam Sundar, M.D., T.K. Jha, M.D., C.P. Thakur, M.D., Juergen Engel, Ph.D., Herbert Sindermann, Ph.D., Christina Fischer, Klaus Junge, Ph.D., Anthony Bryceson, M.D., and Jonathan Berman, M.D., Ph.D.
Background There are 500,000 cases per year of visceral leishmaniasis,which occurs primarily in the Indian subcontinent. Almost alluntreated patients die, and all the effective agents have beenparenteral. Miltefosine is an oral agent that has been shownin small numbers of patients to have a favorable therapeuticindex for Indian visceral leishmaniasis. We performed a clinicaltrial in India comparing miltefosine with the most effectivestandard treatment, amphotericin B.
Methods The study was a randomized, open-label comparison, inwhich 299 patients 12 years of age or older received orallyadministered miltefosine (50 or 100 mg [approximately 2.5 mgper kilogram of body weight] daily for 28 days) and 99 patientsreceived intravenously administered amphotericin B (1 mg perkilogram every other day for a total of 15 injections).
Results The groups were well matched in terms of age, weight,proportion with previous failure of treatment for leishmaniasis,parasitologic grade of splenic aspirate, and splenomegaly. Atthe end of treatment, splenic aspirates were obtained from 293patients in the miltefosine group and 98 patients in the amphotericinB group. No parasites were identified, for an initial cure rateof 100 percent. By six months after the completion of treatment,282 of the 299 patients in the miltefosine group (94 percent[95 percent confidence interval, 91 to 97]) and 96 of the 99patients in the amphotericin B group (97 percent) had not hada relapse; these patients were classified as cured. Vomitingand diarrhea, generally lasting one to two days, occurred in38 percent and 20 percent of the patients in the miltefosinegroup, respectively.
Conclusions Oral miltefosine is an effective and safe treatmentfor Indian visceral leishmaniasis. Miltefosine may be particularlyadvantageous because it can be administered orally. It may alsobe helpful in regions where parasites are resistant to currentagents.
Source Information
From the Institutes of Medical Sciences, Banaras Hindu University, Varanasi (S.S.); the Kala-azar Research Center, Brahmpura, Muzaffarpur (T.K.J.); and Balaji Utthan Sanastan, Patna (C.P.T.) all in India; ZentarisAsta Medica, Frankfurt am Main, Germany (J.E., H.S., C.F., K.J.); the London School of Hygiene and Tropical Medicine, London (A.B.); and the Walter Reed Army Institute of Research, Silver Spring, Md. (J.B.).
Address reprint requests to Dr. Berman at the National Center for Complementary and Alternative Medicine, 6707 Democracy Blvd., Ste. 401, Bethesda, MD 20892, or at bermanjo{at}mail.nih.gov.
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