WASHINGTON (AP) — Surging interest in the purported benefits of psychedelic drugs has given rise to books, documentaries and conferences dedicated to the mind-altering substances . Now add one more business to the list: psychedelic retreats . Hundreds of outfits across the world are offering multiday trips where attendees pay for drug-assisted experiences claiming to promote psychological healing , personal growth and other benefits. Many have safety procedures in place, but they still carry “