Pain Killers that will not make you drowsy.

Hi,
I have a lot of pain in my shoulders due to bone mets. The doc prescribed 2 tabs of tremadol (total 100mg) a day. This relieves the pain but gives me hangover like felling. Even If I take it at night around 8pm I tend to feel drowsy and woozy till 2 Oclock in the afternoon next day.
He has now put me on duracet which causes less wooziness but at the same time does not relive the pain as much. Are there any killers which will do the trick and not leave me like a zombie.
In the past I tried synflex, arcoxia ( anti infalamatory) but they do not seem to rellieve the pain. Any info from you guys is valuable. Thanks very much.

Cheers,
Ragini