Could be. For years I thought that one time when I was 17 I went downtown for a medical appointment by myself. I rode the train back and arrived around dusk. The strongest part was the memory of the train ride back at dusk. Sitting there, holding a prescription they had given me.
But it turned out not to be real.
You mean hallucinations? No. Drugs are ultimately bad for the brain function because one becomes lucid. Drugs damage neural pathways that control all the functions in the body. If you take drugs continuously, the first function to go is the motor functions. This controls the movements and ability to control your arms and legs. Then is your perception to feel perfectly aligned with your mental capacity to direct your mind to tell your body to move or control the central nervous system. So, no! I do not do drugs.