Hey Pas, welcome to the boards
Suboxone drug name buprenorphine, is a partial opiate agonist. This drug is an opiate but differs from drugs like Oxycodone which are full opiate agonist. A full agonist causes more euphoria and more withdrawl symptoms when stopped. A partial agonist will not cause the same amount of euphoria or withdrawl symptoms.
The unique thing about suboxone is that is approved for opiate dependence and addiction currently. However, I have heard of docs using it for pain management. But it is currently only approved for opiate dependence and addiction. And the doctor must be certified to prescribe this drug.
Another unique thing about this drug is that it will take over the opiate receptors. So for instance if you take a high dose of oxycodone daily, and then suddenly start suboxone, the suboxone will take over the receptor causing you to go into withdrawl. Usually the doc will have you come in already in mild WD's before starting suboxone.
Your doc may be weaning you off opiates if he is using this drug. It does have pain relieving effects, but not to the extent of oxycodone or the like. Like I mentioned though, this drug is currently approved for addiction and dependence. But I have read some stories of it being used off label.
Good luck, let us know how it works for you. Take Care