Explanation
A: Barbiturates: Barbiturates are a class of drugs that act as central nervous system depressants. They are commonly used as sleeping pills due to their ability to induce sleep and promote relaxation. However, they are also highly addictive and can have dangerous side effects when used improperly.
B: Opiate Narcotics: Opiate narcotics are pain relievers that work by binding to receptors in the brain and nervous system. While they can induce drowsiness and even sedation, they are not commonly used as sleeping pills due to their high risk of addiction and other negative side effects.
C: Hallucinogens: Hallucinogens are drugs that alter perception, mood, and cognitive processes. They do not induce drowsiness or promote sleep, and are not used as sleeping pills.
D: Antihistamines: Antihistamines are a class of drugs used to treat allergic reactions and other conditions related to inflammation. While some antihistamines can cause drowsiness as a side effect, they are not typically used as sleeping pills because they are less effective at inducing and maintaining sleep than barbiturates and other sedatives.
