Tolerance builds so quickly that it literally won't work taken too close together. There aren't physical cravings either.

I feel that it could certainly be done too frequently, but it's very resistant to being addictive. I suspect it would be easier to get addicted to tylonal. I can't comment on other research chemicals, which are often sold under the label of LSD.

Alcohol is well-known to be addictive and has organizations such as alcoholics anonymous to get help.

Could you elaborate? I've been surrounded by regular drug users for at least a decade at this point, and I've see dependency/addiction to all sorts of drugs, including those that are often considered non-addictive. And that's not even counting addiction to gaming, food, sex, and so on.

I have not encountered a single case where someone appeared to be dependent on or addicted to acid. Sure, some people used it a little more than I'd consider healthy, but calling that an addiction or even a dependency would be stretching it.