available over the counter: no

uses: severe pain; prevent or ease withdrawl symptoms during detoxification

mechanism of action: long acting opioid which binds with natural opioid receptors throughout central nervous system, altering perception of and emotional response to pain

side effects

• common: dizziness, lightheadedness, nausea, vomiting, constipation, itching
  
• less common: sweating, swelling of feet and ankles, flushing of face
  

concerns: notify your doctor or dentist before any surgery