Marijuana helps me concentrate though. It slows down my thoughts enough to let me process them. I would have gladly accepted this answer from him, but he refuse

Marijuana helps me concentrate though. It slows down my thoughts enough to let me process them. I would have gladly accepted this answer from him, but he refused to talk about it. I live in a state where marijuana is highly illegal and having a prescription back up actually allows me to smoke less marijuana. I typically only smoke at the end of the day when the methylphenidate is worn off and if a I take another I can't sleep. I don't think that there is any real evidence that marijuana lessens the effects of methylphenidate (certainly no studies) or has any interaction with it at all. The main thing I'm upset about is that there was no discussion allowed. He has no idea of what my usage habits are or why I use.