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Phenytoin (PHT), sold under the brand name Dilantin among others, [1] is an anti-seizure medication. [3] It is useful for the prevention of tonic-clonic seizures (also known as grand mal seizures) and focal seizures , but not absence seizures . [ 3 ]
Fosphenytoin is approved in the United States for the short-term (five days or fewer) treatment of epilepsy when more widely used means of phenytoin administration are not possible or are ill-advised, [4] such as endotracheal intubation, status epilepticus or some other type of repeated seizures; cluster seizure, vomiting, and/or the patient is unalert or not awake or both.
Phenytoin, a CYP2C9 inducer, would increase its activity and the rate of warfarin breakdown, thereby reducing its efficacy. [25] Patients should avoid the co-administration of warfarin and phenytoin. In cases where both drugs must be used together, warfarin dosing may be titrated up to cope with the reduced efficacy. [26]
In pharmaceutical sciences, drug interactions occur when a drug's mechanism of action is affected by the concomitant administration of substances such as foods, beverages, or other drugs. A popular example of drug–food interaction is the effect of grapefruit on the metabolism of drugs .
Clonazepam may affect levels of phenytoin (diphenylhydantoin). [101] [103] [104] [105] In turn, Phenytoin may lower clonazepam plasma levels by increasing the speed of clonazepam clearance by approximately 50% and decreasing its half-life by 31%. [106] Clonazepam increases the levels of primidone [104] and phenobarbital. [107]
Felbamate interacts with several other AEDs, including phenytoin, valproate, and carbamazepine; dosage adjustments may be necessary to avoid adverse effects. Concomitant administration of felbamate and carbamazepine decreases blood levels of both drugs, while increasing the level of carbamazepine-10,11 epoxide , the active metabolite of ...
You’re wise to be wondering about minoxidil drug interactions. Both over-the-counter (OTC) and prescription medications have the potential to interact with other substances, including supplements.
"Indiana University Department of Medicine Clinical Pharmacology Drug Interactions Flockhart Table ™". "INHIBITORS, INDUCERS AND SUBSTRATES OF CYTOCHROME P450 ISOZYMES". "The Life Raft Group: Long List of Inhibitors and Inducers of CYP3A4 and CYP2D6". "DRUGBANK Online: Cytochrome P-450 Enzyme Inhibitors".
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