hydralazine, isoniazid, phenytoin
Some drugs, such as phenytoin, sodium valproate, and methotrexate, also increase the incidence of clefting
Drugs that decrease ADH levels include alcohol, beta-adrenergic agents, morphine antagonists, and phenytoin (Dilantin).
Phenytoin
lipid-lowering drugs such as fenofibrate (Tricor) and bezafibrate (Bezalip); metformin (Glucophage), a drug to modify insulin resistance; anti-epileptic drugs such as phenobarbital, phenytoin (Dilantin)
phenytoin (Dilantin), aspirin, sulfa drugs such as Bactrim and Gantrisin, tetracycline and some other antibiotics and cimetidine (Tagamet). NSAIDs such as ibuprofen (Motrin, Advil) are also known to interact with other classes of antirheumatic drugs.
The density of phenytoin is 1,257 g/cm3.
antiseizure drugs such as phenytoin (Dilantin) and carbamazepine (Tegretol), anticoagulants such as warfarin (Coumadin), and drugs that slow the central nervous system such as alprazolam (Xanax), diazepam (Valium), and secobarbital (Seconal).
If you're using it in the context of fosphenytoin it stands for Phenytoin Equivalents. This is to help with conversion between the two drugs.
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Glossopharyngeal, trigeminal, and postherpetic neuralgias sometimes respond to anticonvulsant drugs, such as carbamazepine or phenytoin, or to painkillers, such as acetaminophen. Trigeminal neuralgia may also be relieved by surgery.
alcohol, non-steroidal anti-inflammatory drugs (NSAIDs) such as Motrin, oral contraceptives, the anti-seizure drug phenytoin (Dilantin), the blood-thinning drug warfarin (Coumadin), the cholesterol-lowering drug cholestyramine (Questran