How to overcome a perscription drug addiction?

Can you answer Jamie’s question about Addiction?:

My boyfriend was in a serious car accident years ago and takes painkillers for his injuries. He is in excruciating pain everyday but has become dependant on his pain killers.

He believes he has become addicted to his pills.

Should he be taken off his medication? < even with the pain he is in?

Should he have his medication switched periodically to prevent addiction?

What other options do you suggest?

Teen Drug Rehab Centers