You can't do any drug responsibly. I don't mean that as an insult , merely as a fact. It really sucks, but you have one of those personalities... if you aren't addicted to uppers, you're addicted to opiates, if you aren't addicted to opiates, something will take its place. I suggest stopping entirely, because it has only been a couple weeks. Go to counseling. It sounds lame, but it's a lot cooler than becoming a junkie.