“…It is well documented that analgesics containing a combination of opioid and nonopioid agents can provide effective pain relief. Combination opioid/nonopioid therapy with oxycodone (OC) and acetaminophen (APAP), for example, has been shown to provide effective analgesia in the treatment of low back pain,2–4 arthritis,2,5–8 cancer,2,9 and postoperative pain 2,10–13. In addition, combining analgesic agents with different mechanisms of action is intended to be additive or synergistic, such that lower doses of each agent may theoretically be used 2,14–17…”