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2018 Price of Phenytoin
Phenytoin sodium powder
* price without discount in nearest pharmacy. Price may vary.
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Phenytoin volume of distribution
Discount Cards 16,000+
Clients Benefit 29%
Total savings $4,735,080
What is Phenytoin
An anticonvulsant that is used in a wide variety of seizures. It is also an anti-arrhythmic and a muscle relaxant. The mechanism of therapeutic action is not clear, although several cellular actions have been described including effects on ion channels, active transport, and general membrane stabilization. The mechanism of its muscle relaxant effect appears to involve a reduction in the sensitivity of muscle spindles to stretch. Phenytoin has been proposed for several other therapeutic uses, but its use has been limited by its many adverse effects and interactions with other drugs.
Phenytoin mechanism of action
Phenytoin acts on sodium channels on the neuronal cell membrane, limiting the spread of seizure activity and reducing seizure propagation. By promoting sodium efflux from neurons, phenytoin tends to stabilize the threshold against hyperexcitability caused by excessive stimulation or environmental changes capable of reducing membrane sodium gradient. This includes the reduction of post-tetanic potentiation at synapses. Loss of post-tetanic potentiation prevents cortical seizure foci from detonating adjacent cortical areas.
Dosage forms of Phenytoin
|Capsule, extended release||oral||30 mg/1|
A S Medication Solutions Llc
Humans and other mammals
Indication of Phenytoin
For the control of generalized tonic-clonic (grand mal) and complex partial (psychomotor, temporal lobe) seizures and prevention and treatment of seizures occurring during or following neurosurgery.
Toxicity of Phenytoin
Oral, mouse: LD sub 50 /sub = 150 mg/kg; Oral, rat: LD sub 50 /sub = 1635 mg/kg. Symptoms of overdose include coma, difficulty in pronouncing words correctly, involuntary eye movement, lack of muscle coordination, low blood pressure, nausea, sluggishness, slurred speech, tremors, and vomiting.
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