Methamphetamine is poison man. Every time you put that shit in your body, you are increasing the likelihood of ending up as one of the babbling, crazy ghouls running around downtown and I'm very sad to say that the damage is mostly permanent by most accounts. Think very hard about what you want. I've seen brilliant minds reduced to fucking madness in the span of two years. I made it 10 years without crying for another Heroin user and as I sit here I have a tear in my eye thinking about how I might never know these same people again, as I knew them once before. It's fucking bulshit. Methamphetamine is no joke and this is from someone who has touched dead bodies, narcan'd four different people with a smile on my face.
Methamphetamine use classified as fairly heavy would be about a gram per day. That's not to say there aren't folks using 3.5g a day of crystal meth, but that would be the very, very high end. Using a gram of Meth a day implies you're in the professional leagues, because 50mg of the Dextrometh that is out on the street would have a naive user tweaking for a full day. So, there are people using a gram per day simply to function.