Acquired Methemoglobinemia, also known as drug-induced methemoglobinemia, is related to methemoglobinemia and hemolytic anemia. An important gene associated with Acquired Methemoglobinemia is HBG2 (Hemoglobin Subunit Gamma 2), and among its related pathways/superpathways is Methylene Blue Pathway, Pharmacodynamics. The drugs Methylene blue and Enzyme Inhibitors have been mentioned in the context of this disorder. Affiliated tissues include kidney and lung, and related phenotypes are methemoglobinemia and vomiting