Caffeine. Most people who are allergic to coffee are allergic to the caffeine in it. Caffeine is a naturally occurring drug classified as a stimulant. Itâs found in many different things including tea and coffee and is a natural byproduct of various plants.
LSD long term use and effects can be very serious. Long term effects of LSD use can occur in anyone who uses LSD, though heavy users, or those who use the drug over a longer period of time, are more likely to experience long term effects.LSD long term use and effects include:1  Tolerance, which causes a person to take more of the drug, which can lead to life-threatening overdoses. 2  Acid flashbacks, or hallucinogen persisting perception disorder, an uncontrolled event where the person experiences the effects of LSD use again without taking the drug.SD long term use and effects can be very serious. Long term effects of LSD use can occur in anyone who uses LSD, though heavy users, or those who use the drug over a longer period of time, are more likely to experience long term effects. LSD long term use and effects include:
Flashbacks and LSD. Some LSD users relive their experiences after the effects of the drug have worn off. Flashbacks are more common with regular users of acid, but it is possible for a person who has only tried it occasionally to have this experience.he LSD effect is described as a 'trip' because it is a long (8-12 hours) and powerful experience which takes you beyond normal perception and then back again.