If LSD is not addictive how do you develop tolerance for it

For the pure "drug" there was no physical addiction, but there was the chance of a powerful emotional addiction. Also, for pure LSD, there is no tolerance level that decreases its effects.

For decades, what is called LSD is a mixture of incomplete, adulterated LSD plus added chemicals and drugs and other substances.

People thinking they are taking pure LSD are actually taking a "drug" that could contain more than ten or twenty other substances; probably even more. Many of the additives can be very harmful. It is common for the "LSD" to be "spiked" with various animal tranquilizers. Others may be experimental drugs with unknown side-effects.

Today's "LSD" will give people a trip. but it is nothing like the pure LSD of the past. You will go somewhere, but you will not know where you'll go or what is in what you've ingested. Don't ever trust anyone who says, "This is the pure thing." They either don't know or they are lying. The days of purity have long passed.

By the way, the same is true of "imported" marijuana, which has long been "sprayed" with narcotics to give it an extra "kick" or a "relax-reaction." Like supermarket vegetables, it is far from being chemical-free.

So make your choices. Realise that nothing is harmless; even water - in certain quantities- can kill. If you're going to play the dangerous game of drugs, be aware that you are playing Russian Roulette.