Harada N, Okajima K
Hi Marre, thanks for the link - very informative
Green urine The urine can turn green because of the following: drugs and other compounds containing phenol, such as promethazine, used for allergy and nausea, and propofol, a drug used in anesthetics other drugs, including the antidepressant amitriptyline, cimetidine, which reduces stomach acid, and the painkiller indomethacin dyes, including indigo-blue, indigo carmine, which is used in kidney tests, carbolic acid, and flavin derivatives biliverdin, a bile pigment infection with Pseudomonas bacteria Methylene blue, a dye that has also been used as a drug, can produce a blue-green color to the urine
10.1371/journal.pcbi.1000155 274 HubbardS
meaning that animal studies have shown some adverse effect or there are no well-controlled studies in humans, but potential benefits may warrant use despite potential risks