Is it safe to use psilocybe if you're schizotypal? The main symptoms are superstitiousness, bizarre ideas and unusual perceptions such as strong sense of presence, olfactory hallucinations and hallucinated slight movements.
I've heard psilocybe can induce psychosis, but only if you're already psychotically inclined:
"Some individuals enter transient and sometimes prolonged psychotic states after use of
psychedelics, including psilocybin (Benjamin 1979; Halpern and Pope 1999; Strassman
1984). Because in nearly all cases, psychosis appears after use without evaluation of
psychological state prior to psilocybin use, drawing conclusions about causality is
difficult. After examining the literature, Strassman concluded that hallucinogens,
including psilocybin, might trigger psychotic episodes, but in a non-specific and non-
etiologic manner, and that they did not cause psychosis in people (Strassman 1984).
Researchers examining the prevalence of psychiatric reactions through questionnaires
sent to researchers conducting controlled studies with the related serotonergic
hallucinogen LSD found that 0.08% of 5000 study volunteers experienced psychiatric
symptoms that lasted more than two days (Cohen 1960). The rate of occurrence for
psychiatric symptoms occurred at the slightly higher rate of 0.18% in psychiatric patients.
Another survey of a separate sample of 4300 research volunteers reported a rate of
serious, persistent psychiatric reactions in 0.9% of the sample (Malleson 1971).
Psilocybin and LSD produce similar subjective effects. Hence these findings suggest that
participating in a research study involving the administration of a psychedelic compound
similar to LSD is extremely unlikely to trigger transient or persistent psychosis. Past
research with LSD and other psychedelics did not apply as stringent criteria for
participant selection or screening as are used today, making the low rates of psychosis
especially notable (Halpern and Pope 1999), and likely overestimates the likelihood of
prolonged psychoses or other psychopathological effects in a study wherein participants
are screened for past or present psychotic disorders. The occurrence of transient or
persistent psychosis can be prevented or further reduced by excluding people on the basis
of the presence of past or current psychotic disorders or such disorders in first-degree
relatives, such as biological parent or sibling."
(Bron: http://www.maps.org/research/psilo/psilo_ib.pdf)
So if you're not suffering from some psychotic disease or other, it's safe. What if you're half psychotic? Could it aggravate symptoms? Has anyone else who's schizotypal got any experience with psilocybe?