True Dangers of drugs
There are mainly two things that can seriously damage the information stored in our astral body and hence hurt us for many lifetimes to come: drugs and a loud noise. Both can actually significantly reverse the Universal process of our conscious evolution. Let me explain why.
They can destroy or even erase important information already stored in our consciousness and replace it with false data. Such re-programming of consciousness may take us many lifetimes to correct. The extent of the damage depends on how long a person has been subject to these harmful influences.
I have held long and exhausting discussions with people who used hallucinogenic drugs. Nearly all of them were impressed by “visions”, “trips” or “hallucinations” and argued that drugs help them to increase their awareness. Actually, nothing can be further from the truth than such a statement. The ability of Astral travel is a natural ability and every child can do it. There is absolutely no need to use drugs. All you need is to learn meditation, concentration and practice them everyday.
Imagine getting a University degree in engineering or medicine for watching ads and scrambled fantasy movies on TV. This is what drugs do: entertain you. You will need to re-learn everything from the beginning if you ever need to USE the knowledge, erased by false and distorted information generated with drugs. There are no shortcuts in the spiritual and conscious evolution. This is the Law of the Universe.
Many people ask me for the “evidence”. Consider this: every civilisation on Earth, which used drugs collapsed to nothing within a few generations. For example, in ancient Egypt 17,000 years ago people constructed a Great Pyramid from @50 tonne solid stone blocks. The Great Pyramid is comparable in height to the highest 20-th century buildings (146 m), and even today is positively impossible to build anything similar, using any amount of money and time. But when their descendants started using drugs, not only did they lose all their knowledge and all their sciences, but no one actually remembers what the Great Pyramid was for. Today “scientists” can only wonder. The entire civilisation decayed to nothing.
If you use drugs, you risk being re-born in your next lifetime as a cripple, retarded or both, simply because there might be not enough information in your consciousness (your subconscious mind) to build your new body properly.
“The Universal Law is well established and is as strictly enforced as that which controls the planets revolutions around their suns. If you make a mistake, you pay the penalty – immediately, in ten years time, or in ten centuries time, but all errors must be paid for.”
The Universal learning occurs because everyone has to face the consequences of his/her own mistakes. That way we learn what is a mistake and ultimately learn how to live a life. What if we won’t? I guess that those of us who are absolutely stubborn and do not want to learn will get destroyed and re-cycled, as everything in Nature.
Psychedelics 
that made me laugh out loud