Drugs are death, slow, but inevitable, the most effective mean of personality degradation, the speedway to hell. Any drugs change human brain chemistry, causing violation of some certain brain functions, this way altering its activities. Marijuana brings euphory and impairs short-term memory, attention and eye coordination, also considerably polluting lungs; amphetamines and barbiturates alter the staging of sleep and wake, making human organism hyper-active for many hours, also causing hyper-irritability and paranoia, plus after several day on barbiturates a person must rest for many hours because of enormous exhaustion; LSD impacts perception and cognition putting a person in an imaginary world of hallucinations, is causes loss of major cognitive functions and in many cases schizophrenia and a lethal outcome and so does absinth, plus it pushes a person into depression and has a very bad effect on physical health; cocaine causes euphoria and affects brain physiology really badly;