Aprobarbital is a barbiturate derivative. Aprobarbital have been used for the short-term treatment of insomnia and for routine sedation to relieve anxiety, tension, and apprehension however, barbiturates generally have been replaced by benzodiazepines.

Aprobarbital:
https://drugs.ncats.io/drug/Q0YKG9L6RF

Aprobarbital is a barbiturate derivative synthesized in the 1920s by Ernst Preiswerk. It has sedative, hypnotic and anticonvulsant properties, and was used primarily for the treatment of insomnia. Aprobarbital was never as widely used as more common barbiturate derivatives such as phenobarbital and is now rarely prescribed. This compound belongs to the class of organic compounds known as barbituric acid derivatives.

Excerpt from hmdb.ca:
http://www.hmdb.ca/metabolites/HMDB0015441

• A barbiturate derivative
• Invented in the 1920s
• It has sedative, hypnotic and anticonvulsant properties
• Was used primarily for the treatment of insomnia

Aprobarbital was never as widely used as the more common barbiturate derivatives like phenobarbital. It is now rarely prescribed as it has been replaced by newer drugs with a better safety margin.