Avoid primaquine, except in the following cases where established expert consensus guidelines for the treatment of malaria should be followed: (1) Treating Plasmodium vivax or Plasmodium ovale malaria for radical cure of liver-stage infections: 0.75 mg/kg once weekly x8 weeks (WHO) or 45 mg once weekly x8 weeks (CDC) - with close monitoring for hemolysis; (2) Treating Plasmodium falciparum malaria by using primaquine single dose as a gametocytocide at 0.25 mg/kg (WHO) - without need for monitoring for hemolysis.