Methæmoglobinæmi, som ikke svinder efter reduktion eller seponering af behandlingen, kan behandles med intravenøst vitamin C, intravenøst methylenblåt eller blodtransfusion på baggrund af den kliniske situation.
Methaemoglobinaemia that does not resolve after reduction or discontinuation of therapy can be treated with intravenous vitamin C, intravenous methylene blue, or blood transfusion, based upon the clinical situation.