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Phenytoin - Wikipedia. This article is about the drug also called . For dolantin, see pethidine. Phenytoin. Clinical data. Pronunciation; Trade names.

Originally Dilantin, many names worldwide. It is useful for the prevention of tonic- clonic seizures, partial seizures, but not absence seizures. The intravenous form is used for status epilepticus that does not improve with benzodiazepines.

It may also be used for certain heart arrhythmias or neuropathic pain. It can be taken intravenously or by mouth. Potentially serious side effects include sleepiness, self harm, liver problems, bone marrow suppression, low blood pressure, and toxic epidermal necrolysis. There is evidence that use during pregnancy results in abnormalities in the baby. It appears to be safe to use when breastfeeding. Alcohol may interfere with the medication's effects.

A period of 5–1. 0 days may be required to achieve anticonvulsant effects. Focal seizures: Mainly used to protect against the development of focal seizures with complex symptomatology (psychomotor and temporal lobe seizures). Also effective in controlling partial seizures with autonomic symptoms. Absence seizures: Not used in treatment of pure absence seizures due to risk for increasing frequency of seizures. However, can be used in combination with other anticonvulsants during combined absence and tonic- clonic seizures. Seizures during surgery: Used as prevention and treatment of seizures occurring during and after neurosurgery. Status epilepticus: Considered after failed treatment using a benzodiazepine due to slow onset of action.

Anticonvulsant effect: 1. However, optimal seizure control is very important during pregnancy so drug may be continued if benefits outweigh the risks. Due to decreased drug concentrations during pregnancy, dose of phenytoin may need to be increased if only option for seizure control. Breast feeding: The manufacturer does not recommend breast feeding because low concentrations of phenytoin are excreted in breast milk. Consider using decreased maintenance dose. Kidney disease: Do not use oral loading dose. Can begin with standard maintenance dose and adjust as needed.

IV use is contraindicated in patients with sinus bradycardia, SA block, second- or third- degree AV block, Stokes- Adams syndrome, or have known hypersensitivity to phenytoin or any ingredient in the respective formulation or to other hydantoins. Common side effects include nausea, stomach pain, loss of appetite, poor coordination, increased hair growth, and enlargement of the gums. Potentially serious side effects include sleepiness, self harm, liver problems, bone marrow suppression, low blood pressure, and toxic epidermal necrolysis. There is evidence that use during pregnancy results in abnormalities in the baby. It appears to be okay during breastfeeding.

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Phenytoin, sold under the brand name Dilantin among others, is an anti-seizure medication. It is useful for the prevention of tonic-clonic seizures, partial seizures. AskMen's Health & Sports channel brings you all the health, sports and fitness advice you need. The official website of Logan City, providing general information, links to city departments, local services, calendar, and contact information.

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Alcohol may interfere with the medication's effects. IV infusion should not exceed 5. Heart monitoring should occur during and after IV infusion. Due to these risks, oral phenytoin should be used if possible. At toxic doses, patients experience vertical nystagmus, double vision, sedation, slurred speech, cerebellar ataxia, and tremor.

The degree of atrophy is related to the duration of phenytoin treatment and is not related to dosage of the medication. Folate is presented in foods as polyglutamate, which is then converted into monoglutamates by intestinal conjugase. Phenytoin acts by inhibiting this enzyme, thereby causing folate deficiency. The syndrome consists of craniofacial anomalies (broad nasal bridge, cleft lip and palate, smaller than normal head) and a mild form of mental retardation (average IQ=7. Some recommend avoiding polytherapy and maintaining the minimal dose possible during pregnancy, but acknowledge that current data do not provide clear answers. Effects consist of the following: bleeding upon probing, increased gingival exudate, pronounced gingival inflammatory response to plaque levels, associated in some instances with bone loss but without tooth detachment. Online streaming Infiltration II in english with subtitles 1440p 16:9 here. Hypertrichosis, Stevens- Johnson syndrome, purple glove syndrome, rash, exfoliative dermatitis, itching, excessive hairiness, and coarsening of facial features can be seen in those taking phenytoin.

WATE.com provides continuously updated news, weather and sports coverage of Knoxville and East Tennessee. Focalin is a chemical variant of methylphenidate, dextro- or dexmethylphenidate, and also comes in an XR version. Naturally, the manufacturer claims it is better than. New York's Tenement Museum focuses on America's urban immigrant history. The Tenement Museum provides walking tours and is a popular attraction in the Lower East Side. Java developers discussing Java J2EE, java software, Java programming and other trends in server side development.

Phenytoin therapy has been linked to the life- threatening skin reactions Stevens–Johnson syndrome (SJS) and toxic epidermal necrolysis (TEN). These conditions are significantly more common in patients with a particular HLA- Ballele, HLA- B*1. Variations within the CYP2. C9 gene that result in decreased enzymatic activity have been associated with increased phenytoin concentrations, as well as reports of drug toxicities due to these increased concentrations. Food and Drug Administration (FDA) notes on the phenytoin drug label that since strong evidence exists linking HLA- B*1. SJS or TEN in patients taking carbamazepine, consideration should be given to avoiding phenytoin as an alternative to carbamazepine in patients carrying this allele.

People on phenytoin should be monitored for any changes in mood, the development or worsening depression, and/or any thoughts or behavior of suicide. Phenytoin induces metabolizing enzymes in the liver. This leads to increased metabolism of vitamin D, thus decreased vitamin D levels.

Vitamin D deficiency, as well as low calcium and phosphate in the blood cause decreased bone mineral density. Antacids administered in a peptic ulcer regimen may decrease the AUC of a single dose of phenytoin. Patients should be cautioned against concomitant use of antacids and phenytoin. Consider using other options if possible. Sodium channels are: 1) Closed 2) Open 3) Inactive (phenytoin effect)Phenytoin is believed to protect against seizures by causing voltage- dependent block of voltage gated sodium channels.

This is accomplished by reducing the amplitude of sodium- dependent action potentials through enhancing steady state inactivation. Sodium channels exist in three main conformations: the resting state, the open state, and the inactive state. Phenytoin binds preferentially to the inactive form of the sodium channel. Because it takes time for the bound drug to dissociate from the inactive channel, there is a time dependent block of the channel. Since the fraction of inactive channels is increased by membrane depolarization as well as by repetitive firing, the binding to the inactive state by phenytoin sodium can produce voltage- dependent, use- dependent and time- dependent block of sodium- dependent action potentials. This includes the reduction of post- tetanic potentiation at synapses which prevents cortical seizure foci from detonating adjacent cortical areas. Phenytoin reduces the maximal activity of brain stem centers responsible for the tonic phase of generalized tonic- clonic seizures.

A small increase in dose may lead to a large increase in drug concentration as elimination becomes saturated. The time to reach steady state is often longer than 2 weeks. In 1. 93. 8, outside scientists including H. Houston Merritt and Tracy Putnam discovered phenytoin's usefulness for controlling seizures, without the sedative effects associated with phenobarbital. According to Goodman and Gilman's Pharmacological Basis of Therapeutics. In contrast to the earlier accidental discovery of the antiseizure properties of bromide and phenobarbital, phenytoin was the product of a search among nonsedative structural relatives of phenobarbital for agents capable of suppressing electroshock convulsions in laboratory animals.

He is believed to have supplied large amounts of the drug to Richard Nixon throughout the late 1. Dreyfus' experience with phenytoin is outlined in his book, A Remarkable Medicine Has Been Overlooked. This was partially because Parke- Davis was reluctant to invest in a drug nearing the end of its patent life, and partially due to mixed results from various studies.

In 2. 00. 8, the drug was put on the FDA's Potential Signals of Serious Risks List to be further evaluated for approval. The list identifies medications that the FDA has identified a potential safety issue, but does not mean that FDA has identified a causal relationship between the drug and the listed risk. To address this concern, the Warnings and Precautions section of the labeling for Dilantin injection was updated to include additional information about purple glove syndrome in November 2.

Capsules of other strengths also went up in price by the same factor—2. The American Society of Health- System Pharmacists. Retrieved Aug 2. 2, 2. Rosen's emergency medicine : concepts and clinical practice (7 ed.). Philadelphia: Mosby/Elsevier.

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Hongkong/drug/info/Dilantin/? Actions^http: //ebooks. CBO9. 78. 11. 39. CBO9. 78. 11. 39. A0. 81^Chapter 6.