Hallucinations may be suppressed by chlorpromazine , and convulsions by diazepam . Species of Psilocybe have been used by Native Americans in Mexico for religious ceremonies. However, they all cause similar symptoms when consumed. Symptoms from the mushroom begin 30-90 minutes following consumption. All cause varying degrees of digestive upset.
Commonest symptoms are diarrhea, vomiting and abdominal cramps.
Normally, symptoms clear up in 3-4 hours and complete recovery several days later. Some cases of fatality have been recorded, but these are usually cases in which large quantities of mushrooms have been consumed or if the victims were young children. There are a number of fungi in Hawai'i that have these toxins. They include Agaricus , Chlorophyllum , Marasmius , Naematoloma , Foliate , Scleroderma and probably many others. Because we have not identified the toxins that cause these symptoms, treatment has been restricted to emptying the stomach.