Answer:
1. Alcohol-central nervous system depressant
2.Barbiturates-treat seizures, medical sedative
3.Benzodiazepines-induce sleep, relieve anxiety
4.Opioids(narcotics)-slow and speed up certain parts of your brain functions
-----------------------------------------------------------------------------------------------------------------
Oxycodone-semisynthetic opioid
Ketamine-anesthetic
Codine-narcotic
Heroin-narcotic