Barbiturate 3
Barbiturate 3 : Any of a class of sedative-hypnotic agents derived from barbituric acid or thiobarbituric acid and classified into long-, intermediate-, short-, and ultrashort-acting classes. The ultrashort-acting barbiturates, e.g., thiopental, are used as intravenous anesthetics. The long-acting barbiturate phenobarbital is an important anticonvulsant used in the treatment of epilepsy. Many other barbiturates were widely used as sedatives or hypnotics, but benzodiazepines have replaced them in most uses. Some of these have a high potential for abuse and are Schedule II controlled substances
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