Table 1: Substances that can cause Methemoglobinemia (4) Inorganic Agents Nitrates, fertilizers, chlorates, copper sulfates --fungicides Organic Agents Amyl Nitrate, Isobutyl Nitrite, Sodium Nitrite, Nitroglycerin, Nitroprusside, Nitric Oxide, Nitrogen Dioxide, Trinitrotoluene, Combustion products Drugs Local Anesthetics: Benzocaine, Lidocaine, Prilocaine Pyridium, Anti-malarials --Primaquine, Chloroquine, Rasburicase, Cyclophosphamide, Ifosfamide, flutamide, Acetaminophen,
Acetanilid, Phenacetic, celecoxib, Zopiclone, Methlene Blue (high doses in G6PD-Deficient patients) Antibiotics: Sulfonamides, Nitrofurantoins, P-aminosalicylic acid, Dapsone Industrial/Household Agents Aniline Dyes, Nitrobenzene, naphthalene (moth balls), aminophenol, nitroethane (nail polish remover)