NS Karadsheh, Q Shaker, B Ratroat. Metoclopramide-induced methemoglobinemia in a patient with co-existing deficiency of glucose-6-phosphate dehydrogenase and NADH-cytochrome b5 reductase: failure of methylene blue treatment. Haematologica 2001;86(6):659-660; https://doi.org/10.3324/%x.