Brown Urine
Aetiology—pathologic Hematin, dipyrrole—from unstable haemoglobin—homogentisic acid, melanin, myoglobin, porphyrin, myoglobin,
Aetiology—nonpathologic/physiological Aloin, beets, cascara, chloroquine, cresol, drugs—azo gantricin, methylene blue—aniline dyes, fuschin, menses, iron, metronidazole, niridazole, nitrofurantoin, rhubarb, salol, methoxazole, sulfonamides