Substances Which May Discolor Urine

Dark /  Brown

Cascara

Chloroquine

ferrous salts/ iron dextran

Levodopa

methocarbamol

methyldopa

metronidazole

nitrates

nitrofurantoin

quinine

Senna

sulfonamides

Yellow-brown

Bismuth

Chloroquine

Cascara

Metronidazole

Nitrofurantoin

Primaquine

Senna

Sulfonamides

Blue or blue green

amitriptyline

methylene blue

triamterene

Methocarbamol

Orange/yellow

Chlorzoxazone

Dihydroergotamine 

heparin

phenazopyridine

rifampin

sulfasalazine

warfarin

Red / Pink

daunorubicin or doxorubicin

heparin

ibuprofen

methyldopa

phenothiazines

phenytoin

phenylbutazone

rifampin

Salicylates

senna