I don't think medication will change meditation asides from the fact that it may be harder to get into the "zone." I haven't run into any problems anyway. Meditation is really restful for the mind since it's usually taking in so much information. I mean, you still are but it's focused solely on yourself which is rare and extremely calming So I don't think there are any negative side effects that could happen with medication (but I'm not a doctor haha)

Random thing!! My favorite quote about this is "Meditation. It's not what you think."