1. Plural of phenobarbitone; a barbiturate drug used as a sedative, hypnotic, or anticonvulsant medication.
Usage: chiefly British English; the U.S. term is 'phenobarbital'; medical/pharmaceutical

Examples

• The doctor prescribed phenobarbitones to help control the patient's seizures.
• Phenobarbitones were commonly used as sleeping aids in the mid-20th century.
• The medication cabinet contained several bottles of phenobarbitones for emergency use.
• Phenobarbitones are now less frequently prescribed due to the availability of newer anticonvulsant drugs.
• The pharmacist warned about the potential side effects of phenobarbitones.