flavoxate hydrochloride /flavok″sāt/ , a smooth muscle relaxant. ▪ INDICATIONS: It is prescribed for spastic conditions of the urinary tract. ▪ CONTRAINDICATIONS: GI hemorrhage or obstruction, urinary tract obstruction, or known hypersensitivity to this drug prohibits its use. ▪ ADVERSE EFFECTS: Among the more serious adverse effects are nervousness, nausea, abdominal pain, fever, and tachycardia.