You might want to make sure he is not allergic or overly sensitive to Morphine or similar. I've been on pain meds for 7 yrs (back pain). I've used most pain meds that are available but when my doctor had me try Morphine it made me sick in the manner you described. My best success so far has been Norco 10mg 4x daily and Oxycodone ER 20mg 4x daily, by a manufacturer called Tiva. This combo has given me the best relief so far. Don't expect total pain relief if the pain is severe, sometime the best you can hope for is to take the edge off. Gregg