The common causes of greenish discolouration of urine are :
(1) Phenol containing compounds: Promethazine, Propofol, Thymol,
(2) Dyes: Indigo-blue, Indigo carmine, Carbolic acid, Flavin derivatives,
(3 Biliverdin (in cases of long standing obstructive jaundice),
(4) Amitryptyline (anti-depressant),
(5) Pseudomonas infection,
(6) Cemetidine,
(7) Indomethacin,
(8) Methylene blue (bluish )