Are you taking the long-acting? There OpanaER, extended release. For chronic pain sometimes they put you on a long acting drug for round-the-clock pain and a short acting drug for breakthrough pain. Breakthrough pain is just extra pain as opposed to your normal pain.

I'm taking the short acting one on top of morphine.

Sounds like you're on the long acting. It really approved and hard to get much information but it's not connected to any topical analgesics. If anything it seems like it might be close to codeine, because they keep mentioning codeine sensitivity in reference to it, but it's a completely different opiate.

I'm into much pain to really say that it worked, but nothing is right now.