Other medications associated with green urine may contain phenol groups and include promethazine, thymol, cimetidine, and propofol. The
mechanism of
action appears to be caused by phenol's conjugation by the liver and subsequent excretion by the kidneys. The strength of the green seems to be dose related. Some nonphenol drugs noted to produce green urine are metoclopramide, amitriptyline, and indomethacin.