I was told in no uncertain terms by the crab drugs lecturer about 9 months ago that if someone admitted to taking LSD, even prior to their service, they were liable for medical discharge due to the dangerous nature of LSD flashbacks. I wasn't aware of this before and he seemed to think that this applied across all three services. When I think about it its a fair point, but has anyone heard about this happening to anyone?
Some people experience flashbacks after using LSD. Flashbacks can occur after using LSD just once and can happen as long as a year after taking LSD. Flashbacks involve a sudden reoccurrence of whatever the user experienced while on LSD (things they saw, feelings they felt, etc.) Some long-term users may show symptoms of mental illnesses such as schizophrenia or severe depression.
One hallucinogen user, while not currently intoxicated, may occasionally notice a spontaneous LSD-like flashback, which will go away after a short time. On the other hand, another user may experience constant, irreversible, LSD-like perceptual disturbances that persist 24 hours a day; they can continue for the rest of their life.