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oxamniquine

n. An anthelmintic drug with schistosomicidal activity against ''Schistosoma mansoni''.

Wikipedia
Oxamniquine

Oxamniquine is an anthelmintic with schistosomicidal activity against Schistosoma mansoni, but not against other Schistosoma spp. Oxamniquine is a potent single-dose agent for treatment of S. mansoni infection in man, and it causes worms to shift from the mesenteric veins to the liver, where the male worms are retained; the female worms return to the mesentery, but can no longer release eggs.

It is on the World Health Organization's List of Essential Medicines, the most important medications needed in a basic health system.