Friend uses Speed in pill form
I have a friend (no, really) who uses Speed in pill form. He's very open about it and seems to somewhat control this addiction to a certain extent. He will take on average 1 to 2 pills every week or two weeks, mostly on week-ends but sometimes during the week as well. This time last year, he took on average maybe 1 pill ever two or three weeks, so there has been an increase in the amount he uses. The issue I have with this is that first of all, I don't know a lot about this drug and its effect on a person so it's hard for me to bring this up with him and talk to him about whether he would consider stopping. He reassures me that it's not that big of a deal. Secondly, I don't spend tons of time with him but it seems to me that the drug itself doesn't really have an effect on him in that he doesn't act differently when he's on it, and there is never a 'coming down' period when he's off it and consequently, I don't really have any reason to try to get him to stop other than I'm pretty sure it can't be good for him physically. I've read somewhere that it has an effect on your emotions and may lead to depression etc. but I can't honestly say that he's changed in the past few years and seems as happy and upbeat as he always was. He's been taking the drug regularly for about three or four years now, before that, he would do it once or twice a year.
Can anyone provide me with information on Speed in pill form? There is a lot of info on the web about Crystal Meth but I don't think this is exactly the same. The type of addiction described certainly does not seem to be the same or apply to him, as far as I know.
Also, what do the people who know about this drug think, should I be encouraging him to stop this altogether, or (like he says) is it more comparable to a less serious drug and although it isn't necessarily good, it's not the end of the world as long as he's in control of it? Keep in mind that unless he's really putting himself in danger, I don't want to seem like I'm telling him what to do, he has a mother and he has a girlfriend and I'm neither. Also, this relationship is very important to me, we've been friends for a very long time and I don't want to jeopardize it over something that doesn't really concern me. Honestly, if he was smoking weed, I would simply mind my own business but in this case I'm afraid I'm being naïve and that he may end up in the hospital one day or worse and I'm going to feel like the biggest idiot for ignoring this. Or am I overreacting?