Final answer:
Sedative-hypnotic drugs are used to treat anxiety and insomnia.
Step-by-step explanation:
Sedative-hypnotic drugs are used to treat anxiety and insomnia. These drugs have a calming effect on the central nervous system, helping to reduce feelings of anxiety and promote sleepiness. Examples of sedative-hypnotic drugs include benzodiazepines like diazepam (Valium) and barbiturates.