Probarbital
Probarbital is a barbiturate derivative that has been used as a sedative and hypnotic agent. It is known for its ability to depress the central nervous system (CNS), leading to effects ranging from mild sedation to total anesthesia.
Pharmacology
Probarbital works by enhancing the activity of the gamma-aminobutyric acid (GABA) neurotransmitter, which is the primary inhibitory neurotransmitter in the CNS. This action results in increased chloride ion conductance through the GABA_A receptor, leading to hyperpolarization of the neuron and decreased neuronal excitability.
Medical Uses
Probarbital has been used in the treatment of insomnia, anxiety, and as a pre-anesthetic agent. Its sedative properties make it useful in calming patients before surgical procedures. However, due to the development of safer and more effective medications, its use has declined significantly.
Side Effects
Common side effects of probarbital include drowsiness, dizziness, and headache. More severe side effects can include respiratory depression, hypotension, and dependence. Long-term use can lead to tolerance and addiction.
History
Probarbital was first synthesized in the early 20th century as part of the development of barbiturate drugs. It was one of many barbiturates that were widely used before the advent of benzodiazepines and other modern sedative-hypnotics.
Regulation
Due to its potential for abuse and dependence, probarbital is classified as a controlled substance in many countries. Its use is strictly regulated, and it is generally only available by prescription.
See Also
- Barbiturate
- Sedative
- Hypnotic
- Central nervous system
- Gamma-aminobutyric acid
- Insomnia
- Anxiety
- Respiratory depression
- Dependence
References
External Links
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