Potential causes may include the following:[1]
Digested blood
Medications: Acetazolamide, aluminum hydroxide, aminophylline, amphetamine, amphotericin, anticoagulants, aspirin, betamethasone, bismuth, charcoal, chloramphenicol, chlorpropamide, clindamycin, copper, cortisone, corticosteroid, cyclophosphamide, cytarabine, ethacrynic acid, ferrous salts, fluorides, fluorouracil, halothane, heparin, hydralazine, hydrocortisone, ibuprofen, indomethacin, levodopa, melphalan, methylprednisolone, methotrexate, nitrate, phenylephrine, phosphorous, potassium salt, prednisolone, procarbazine, salicylates, sulfonamide, tetracycline, thallium, theophylline, thiotepa, triamcinolone, warfarin
Causative medications may include boric acid, chloramphenicol, or methylene blue.
Causative diseases may include alcoholic hepatitis, biliary cirrhosis, gallstones, sclerosing cholangitis, biliary strictures, or viral hepatitis.[2, 3]
Causative medications may include cocoa or colchicines.
Potential causes may include the following:
Food: Spinach
Medications: Indomethacin, iron, medroxyprogesterone
Potential causes may include the following:
Food: Rhubarb
Medication: Senna
Potential causes may include the following:
Acute blood
Food: Blackberries
Medications: Aspirin, heparin, barium, lead, oxyphenbutazone, phenolphthalein, phenylbutazone, salicylate, senna, tetracycline syrup, hydroxocobalamin, rifampin[4]
Causative medications may include aluminum hydroxide or bariums.