can laxative change urine color
These are some of the medicines and vitamins that can change the colour of urine: 1  Yellow or yellow-green: cascara, sulfasalazine, the B vitamins. 2  Orange: rifampicin, sulfasalazine, the B vitamins, vitamin C.  Pink or red: phenolphthalein, propofol, rifampicin, laxatives containing senna.