Predisposing factors of urinary retention eg, spinal cord lesion, prostatic hyperplasia; patients w/ epilepsy or at risk of convulsion. Perform allergy skin test 3 days after treatment. Avoid alcohol consumption. Avoid abrupt w/drawal. Not to be taken by patients w/ galactose intolerance, Lapp lactase deficiency or glucose-galactose malabsorption. May affect ability to drive or operate machinery. Renal & hepatic impairment. Pregnancy & lactation. Elderly.