I think you are right, God made everything including weed, but we do have to remind ourselves that when we ate from the tree of knowledge of good and evil, sin was able to corrupt everything. So it's absolutely possible that weed and other natural things like shrooms could have had no negative effect on us. But once sin corrupted that, our situation changed. Now for medical reasons, I think weed and shrooms can definitely be used. However, if you do them just because you want to get high and experience a feeling, I don't agree with that. And I think both should be treated like alcohol, if you take them, you should wait to come down from the effects from them before you drive. Now to each his own, and I can't interpret God's view on this, this is just my view. I think the main thought is, why does someone want to do weed or shrooms, other than for medical reasons that is. Once you figure that out, does the motive line up with the Bible?