tramadol 338338 · Poloxamer 407 · polyethylene glycol · Polyethylene Glycol 4000 · Polyoxyl 15 Tramadol Hydrochloride manufacturer or Tramadol Hydrochloride supplier338 (50.6%). Ear and labyrinth disorders. Verto. 3 (1.4%). 3 (1.0%). 8 (1.5%). 27 (2.5%). 3 (0.4%). Gastrointestinal disorders. Abdominal pain.