"In 2002, at age twenty-eight, David MacLean "woke up" in a foreign land with his memory wiped clean. No money. No passport. No identity. Taken to a mental hospital by the police, MacLean then started to hallucinate so severely he had to be tied down. Soon he could remember song lyrics and scenes from television shows, but not his family, his friends, or the woman he loved. All of these symptoms, it turned out, were the result of the commonly prescribed...