Do not stop abruptly; taper gradually to stop treatment. Use caution in patients with acute pancreatitis, Addison disease, benign prostatic hyperplasia, cardiac arrhythmias, central nervous system (CNS) depression, drug abuse or dependence, emotional lability, gallbladder disease, gastrointestinal (Gl) disorder, pseudomembranous colitis, Gl surgery, head injury, hypothyroidism or untreated myxedema, intracranial hypertension, brain tumor, toxic psychosis, urethral stricture, urinary tract surgery, seizures, acute alcoholism, delirium tremens, shock, cor pulmonale, chronic pulmonary disease, emphysema, kyphoscoliosis, severe obesity, renal or hepatic impairment, elderly or debilitated patients.Avoid alcohol. Reduce dosage if drug is coadministered with other CNS depressants. Thrombocytopenia purpura resulting in kidney failure or death has been reported when extended-release tablets are dissolved and injected IV. May obscure diagnosis of abdominal conditions.Risk of opioid addiction, abuse, and misuse, which can lead to overdose and death Assess each patient's risk prior to prescribing and monitor all patients regularly for the development of these behaviors or conditions Life-threatening respiratory depression, life-threatening, or fatal respiratory depression may occurMonitor for respiratory depression, especially during initiation or following a dose increase