Remember, that though it might seem that drugs are not having an effect on you or your friends, the effect can be subtle at first. Drugs change your perception, your mood, your outlook on life. They affect who you hang out with, the choices you make. Over time, the effects might become a little more obvious, or you may even be oblivious to them as you’re still under the spell. I know I prefer to be able to think with my actual brain, the real me, not a brain under the influence that I simply can’t rely on.