Acceptable Risk is a 1995 novel by American author Robin Cook. A scientist, Edward Armstrong, discovers a mold in a spooky old house he lives in with his girlfriend. In order to test his theory that the discovery could help people feel calm in extreme situations, the scientist injects himself and his fellow scientists with the mold. The man undergoes some strange changes, which may or may not have something to do with the house's first owner, a woman who was hanged under suspicion of being a witch. Are the side effects worth the benefits? What if the side effect was something that had never been seen before? This book explores the practice of designer drugs. The novel was made into a TV film in 2001, directed by William A. Graham, and starring Chad Lowe. Source: Wikipedia (en)