An anthelmintic with schistosomicidal activity against schistosoma mansoni, but not against other Schistosoma spp. oxamniquine 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. (From Martindale, The Extra Pharmacopoeia, 31st ed, p121)