Final answer:
Xanax, Halcion, and Valium are benzodiazepines used for anxiety relief, sedation, sleep induction, and seizure prevention, but must be used under medical supervision.
Step-by-step explanation:
Drugs such as Xanax, Halcion, and Valium are known as benzodiazepines. These medications are central nervous system depressants that are primarily used to relieve symptoms of anxiety, induce sleep, prevent seizures, and create a sedative effect. Benzodiazepines such as Alprazolam (Xanax), Diazepam (Valium), and Lorazepam (Ativan) can have a calming effect and are sometimes prescribed to control acute anxiety on an “as needed” basis. It is important to note that these medications should be used responsibly under the guidance of a healthcare provider due to risks of dependence and interaction with other substances, like prescription opioids.