Contraindications to psychedelic therapy include any medical condition that may be exacerbated by psychedelics, as well as any prior personal or psychiatric history of adverse reactions to psychedelics. Additionally, contraindications can exist if a person is currently pregnant or breastfeeding, as these substances may have negative effects on the developing baby.
Medically speaking, contraindications can vary depending on the drug in question. For instance, LSD and psilocybin are generally safe for most people with no serious contraindications, while MDMA has been known to cause seizures in certain cases.