Technically, the symptoms of all hallucinogens fit the clinical definition of schizophrenia, and stronger hallucinogens such as LSD mimic paranoid schizophrenia. Even marijuana does it in high doses.
I just did a research paper on the subject, so unless every major psychologist that's ever researched the effects of hallucinogenic drugs since 1967 is wrong, then yes, you are clinically insane while you're tripping.

Another interesting fact: marijuana is physically addicting, it just has its own rehab programmed in. It is absorbed into t-lymphocyte fat cells and slowly releases itself into your blood stream, which is why it stays in your urine for so long.

Does anyone else have to pee right now?