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      Treatment of onchocerciasis. The ocular effects of ivermectin and diethylcarbamazine.

      Archives of ophthalmology (Chicago, Ill. : 1960)
      Adult, Anthelmintics, adverse effects, therapeutic use, Clinical Trials as Topic, Diethylcarbamazine, Double-Blind Method, Eye, drug effects, Eye Diseases, complications, diagnosis, drug therapy, Humans, Ivermectin, Lactones, Male, Microfilaria, Middle Aged, Onchocerca, Onchocerciasis, Random Allocation, Retina, parasitology, Time Factors

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          Abstract

          The ocular changes that occur with diethylcarbamazine treatment of onchocerciasis seriously restrict its usefulness. Ivermectin, a newly developed antifilarial drug, was compared with diethylcarbamazine for treatment of onchocerciasis in a double-masked, placebo-controlled trial. Thirty men with moderate to severe infection and ocular involvement were randomly assigned to receive ivermectin as a single oral dose (200 micrograms/kg), diethylcarbamazine (administered for eight days), or placebo. Detailed ocular examinations were performed serially over a 12-month period. Diethylcarbamazine treatment caused a marked increase in living and dead microfilariae in the cornea, punctate opacities, and limbitis during the first week of therapy. Ivermectin had no such effect. However, ivermectin therapy resulted in a long-term reduction in intraocular microfilariae comparable to that seen with diethylcarbamazine. Ivermectin appears to have few ocular complications and be a better-tolerated and more effective microfilaricidal agent than diethylcarbamazine for the treatment of onchocerciasis.

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