To Brometheus, I'm glad for you that things have started anew with your girlfriend.

I noticed that you are aware that she increased some sort of medication. That issue is a huge part of her life and I would bet her parents probably know about it. That whole medication topic could be a launching point for simple talk with her parents if you were in the house.

You care about your girlfriend and they care about their daughter. This is common ground. Why not ask your girlfriend what she's taking. Research it. When the right time comes you'll have a discussion point with her parents that doesn't focus on you. Just some suggestions. I wish you all the best.