The psychedelics revolution may be in full swing, but doctors are still warning about the dangers in the recreational realm — including the rare case of cardiac arrest in a US man following psilocybin use.

New York clinicians say their 48-year-old patient was taking lisdexamfetamine for ADHD but was otherwise healthy with no significant comorbidities or medical history.

According to his wife, he suddenly became unresponsive mid-conversation with “sudden shaking and seizure-like” activity described as slow rhythmic movements with his left shoulder.

She performed CPR with compressions, but emergency medical services found him to be in ventricular tachycardia upon arrival.