It all depends on how you use the drugs, how much you ingest, and how long of a period you do them for. Certain drugs do certain damage. Most drugs do some form of damage after a period of time using them. Whether its to the brain or to different organs. Drugs do damage. And thats not even mentioning the addiction aspect of it all. IMO I think addiction could probably do the worst damage. It totally affects your routine of living. The trust people have for you goes down the drain. You lose good friends, and gain bad ones. All in all, if you are going to do drugs, atleast know what your putting into your body. Because no matter what you may think, drugs DO damage. It may not be shown right away, but its there. Now im not saying I don't do them, because I definitely do, but I used to be very inexperienced with them and reading some of the posts on this thread reminds me of how I was when I first started smoking pot. Yeah at first it doesnt seem like its causing any harm, but ask someone that has smoked marijuana for several years what they did YESTERDAY, they will probably take a good few minutes thinking about the question let alone the answer to it. And thats just yesterday, imagine what would happen if you asked them what they did a week ago. Its rather ridiculous. I used to smoke a whooole lot of it. I recently just quit because im tryin to get my head straightened up for school in January and it was affecting a lot in my life. AND im more of an opiate kinda guy myself anyway. But whatever. The point of the story is, drugs do damage, even "harmless" ones like marijuana. All im asking is that people KNOW what they put into their body before they do it....thanks