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The Sound of Evolution
Phenobarbital
Mechanism of action:
Phenobarbital is a barbiturate derivative. It binds to the barbiturate binding site on the GABA_A receptor complex, prolongs the opening time of chloride channels, and increases Cl⁻ influx, leading to neuronal hyperpolarization. This reduces neuronal excitability and produces sedative and relaxing effects, while also influencing central nervous system regulation associated with tension headaches.
Reference(s):
1. Kwan P et al. (2004). Phenobarbital for the treatment of epilepsy in the 21st century: a critical review. Epilepsia.
2. Taylor S et al. (2001). Phenobarbitone versus phenytoin monotherapy for partial onset seizures and generalized onset tonic-clonic seizures. Cochrane Database Syst Rev.
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