Psilocybin

Psilocybin is a chemical obtained from certain types of fresh or dried mushrooms.
Psilocybin mushrooms are ingested orally. They may also be brewed as a tea or added to other foods to mask their bitter flavor.
The psychological consequences of psilocybin use include hallucinations and an inability to discern fantasy from reality. Panic reactions and a psychotic-like episode also may occur, particularly if a user ingests a high dose.
Psilocybin is currently illegal in Iowa.

Source: DEA