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RX BIN: 015558RX PCN: HTGroup ID: DDN6600Card Holder ID: DDN6600
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2019 Price of Dilantin

$15.8790 capsules/100 mg
price without discount in nearest pharmacy. Price may vary.

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We offer free Phenytoin coupons and discounts that may help you save up to 80% off the retail price in your local pharmacy. Just print your coupon! It’s ready to use and never expire. Present your manufacturer copay card in most local pharmacies to get a discount on Phenytoin every time. What are you waiting for? Claim your prescription drug card now!

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Phenytoin volume of distribution

Volume of distribution of 0.7 L/kg.

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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

FormRouteStrength
Capsule, extended releaseoral30 mg/1
Capsuleoral100 mg
Capsuleoral30 mg

Prescription Generics

true

International Brands

Dilantin

Synonyms

5,5-Diphenyl-imidazolidine-2,4-dione 5,5-diphenylimidazolidine-2,4-dione

Manufacturers

A S Medication Solutions Llc

CAS number

57-41-0

UNII

6158TKW0C5

State

solid

Affected organisms

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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