This is not a guide on tripping. ************** From wiki:
"A 2007 meta-analysis estimated that cannabis use is statistically associated with a dose-dependent increase in risk of development of psychotic disorders, including schizophrenia.[01, Moore]"
"In some cases, HPPD appears to have a sudden onset after a single drug experience, strongly suggesting the drug played a direct role in triggering symptoms. But in other cases, people report gradual worsening of symptoms with ongoing drug use. Drugs that have been associated with HPPD include LSD, 2C-I, 5-MeO-DIPT , MDMA, Psilocybin, Mescaline,  diphenhydramine, and high-doses of dextromethorphan."
* Abstinence in the affecteds' drug use, show a dissapation in symptoms. A clinical study using strict recovery criteria found a recovery rate of 14% within the first five years.  ************
"Unlike Peter Tripp, Gardner didn't use any stimulants to stay awake. The effects of sleep deprivation on Gardner included moodiness, paranoia and hallucinations."
Amanita Muscaria may be nuero-toxic when not prepared at the right temperature or not completely dried.
************ From erowid's page on Psilocybin Mushrooms "Contraindications
Do not operate heavy machinery. Do Not Drive.
Wait for the effects to dissipate completely, before handling heavy machinery. (Including short term memory loss)
User's may pass out due to blood pressure loss if enough was taken.
People who take mushrooms regularly may have a tolerance for the drug for a day to a week after taking them.
Taking psyilocybin containing mushrooms while on an MAOI can dramatically increase the effects of the experience. MAOIs are most commonly found in the prescription anti-depressants Nardil (phenelzine), Parnate (tranylcypromine), Marplan (isocarboxazid), Eldepryl (l-deprenyl), and Aurorex or Manerix (moclobemide). Ayahuasca also contains MAOIs (harmine and harmaline). Check with your doctor if you are not sure whether your prescription medication is an MAOI.
Individuals currently in the midst of emotional or psychological upheaval in their everyday lives should be careful about choosing to use psychedelics such as mushrooms as they can trigger even more difficulty. "
************* * For what it is worth in mushroom hunting, if you don't have a degree in Mycology, you should instead rely on reputable vendors who grow fresh mushrooms and have been growing for a long time.
* If someone has taken a psychedelic mushroom you could keep them away from sharp objects, provide them with a different atmosphere or have a place to relax.
* "hallucinogenic drugs, from LSD to PCP, produce their mind-bending effects by altering the levels of neurotransmitters in specific neurological circuits" --------------------------------------------------------
The following is a link, that list the above mentioned psychedelic.
"Our aim was to identify the precise areas inside the brain where the drug is active. We thought when we started that psilocybin would activate different parts of the brain. But we haven't found any activation anywhere. All we have found are reductions in blood flow"