Just to counter the selection bias in the answers to this question; be careful. A friend of mine took mushrooms and it triggered schizophrenia. That was 30 years ago and he never recovered.
This. Your pre-trip research should include checking if there's any family history of psychosis.
Agree on the biased info. There are reports of cases of cardiac arrest and death after taking magic mushroms. Maybe not common, but it happens. I know the case of a girl that needed cardiopulmonary resuscitacion also.