trospium, an anticholinergic. ▪ INDICATIONS: This drug is used to treat overactive bladder. ▪ CONTRAINDICATIONS: Uncontrolled narrow-angle glaucoma, urinary retention, gastric retention, and known hypersensitivity to this drug prohibit its use. ▪ ADVERSE EFFECTS: Adverse effects of this drug include fatigue, dizziness, headache, dry eyes, vision abnormalities, flatulence, abdominal pain, and dyspepsia. Common side effects include constipation and dry mouth.