The term 'They May Put You To Sleep' refers to two types of drugs: opiates and SEDATIVES. Opiates are a type of drug derived from the opium poppy plant, and they are used to relieve pain. SEDATIVES, on the other hand, are drugs that are used to reduce anxiety and induce sleep. Both opiates and SEDATIVES can be used to help people relax and fall asleep, but they should be used with caution as they can be habit-forming and have serious side effects.