I was told, not long after my TPF, that research suggests that if you truly need medications, you at not at great risk of addiction. The thing is, you must use them only as directed and no more than that. Talk to your doctor if the concern is a valid concern (such as you or a family history of addictions).
TPFs are significant injuries. Being chronically tired and uncomfortable does you nor anyone else any good. The duration and extent of healing and rehabbing from a TPF will make you re-think some thoughts on issues like medications, asking for help, how far to push yourself, etc.