I'm a domestic violence counsellor and I can tell you straight up that this is abusive. It's controlling behaviour and it is not appropriate at all. As everyone has already said, it's possible that he is using the meds himself or perhaps just projecting his own fears about addictions onto you. It also possible that he is doing this out of concern that you may become addicted. Whatever the case may be, find someone you feel comfortable to talk to about this. You don't have to go through this alone. There are plenty of services out there to help women in these types of situations (not sure where you live). It's scary to ask for help but it's worth it. Good luck to you.