I also don't think this belongs here...some good discussion though, so it belongs somewhere for sure. Drugs for many people can help them "escape reality" in different ways, if you define reality differently. If reality is your everyday problems and such, then any mind altering substance which induces euphoria is getting away from it for a little bit, and enjoying yourself. The other interpretation seems like yours OP (correct me if I'm wrong) where reality is what we literally are experiencing around us, and yeah on most substances we are still aware that is there. This notion seems common with the psychedelic class of drugs, but on lower doses for some people they are still aware of their reality as well...in larger doses seems to be where any real reality loss can happen. As long as you more or less know where you are under this definition, then you are in reality.
/end very high possibly not making too much sense opinion