Drug info - Is LSD "different" now compared to the sixties?

[Lobsang]

Ok. I am new here Hi. This is my question and please excuse my lack of chemistry knowledge. Let me try and articulate what I am trying to ask. Given the fact that LSD is a very small dose as it is in micrograms. And this dose easily fits on a blotter. I know that when people say that a blotter can be contamonated with speed or strycinine it cannote be true. Becuase those things would no fit on a blotter hit in a dose that would effect a person. Ok so when they say that LSD now adays is different than it was years ago. Is this true? I mean are there other drugs that can be put on a blotter that have an effect similar to LSD? Or that a blotter that has LSD can be contamonated with that would effect a person? I mean is there any truth to the statement that LSD today is not true LSD but something else many times even on a blotter? Also are there analogs of LSD which appear on blotters sold as LSD? I am not sure I am making my self clear. I have asked a couple of questions.
Thanks if you respond.