Most common (>=5%) Nausea, vomiting, headache, constipation, insomnia, sweating, pain, asthenia, anxiety, depression, rhinitis
Serious Respiratory depression, CNS depression, neonatal opioid withdrawal syndrome, adrenal insufficiency, opioid withdrawal, hepatitis, hypersensitivity reactions, orthostatic hypotension, elevation of cerebrospinal fluid pressure, elevation of intracholedochal pressure
Postmarketing Peripheral edema, serotonin syndrome, anaphylaxis, androgen deficiency, dental decay, glossodynia, glossitis, oral mucosal erythema, oral hypoesthesia, stomatitis, hypoglycemia, opioid-induced esophageal dysfunction