<unk> (injection) is an analgesic opioid that is FDA approved for the {{{indicationType}}} of oramorph(R) SR 15, 30, 60, and 100 mg have been discontinued from the market. Pain, chronic, intractable, pain, chronic (severe), in patients requiring a long-term daily around-the-clock opioid analgesic, pain (moderate to severe), not responsive to non-narcotic analgesics.. There is a Black Box Warning for this drug as shown here.  Common adverse reactions include dermatologic: pruritus (up to 80% ), gastrointestinal: constipation (9% or greater ), nausea (oral, 7% and greater than 10% ; epidural or intrathecal, 15% to 70% ), vomiting (greater than 10% ), neurologic: dizziness (6% ), headache (less than 2% to greater than 10% ), lightheadedness, somnolence ( 3% or greater ), ophthalmic: miosis,renal: Urinary retention (oral, less than 5% ; epidural/intrathecal, 15% to 70% ).
Morphine 
Codeine
Morpholine
Normorphine
Nalorphine
Methadone 
Meperidine 
Benzidine