Phenytoin helps prevent brain cells from working as fast as a seizure requires them to. Do not stop taking it without talking to your doctor. No one should stop taking phenytoin or change the amount they take without their doctor's guidance, however.People who have just started taking phenytoin (or who have just started taking a larger amount) should be careful during activities that might be dangerous, until they know whether they are having any side effects.Overgrowth of the gums (gingival hyperplasia) is more common in children than in adults. It also determines whether it will interact with other medicines or be affected by conditions such as liver disease.Phenytoin is highly effective for seizures and is one of the most commonly used seizure medicines in North America.
This includes prescription or nonprescription (over-the-counter [OTC]) medicines and herbal or vitamin supplements. It is best used for partial-onset seizures, which begin in one area of the brain.
If there is none, ask the pharmacist for a device to measure phenytoin suspension. You may also report side effects at https://www.fda.gov/medwatch.
Use phenytoin suspension as ordered by your doctor. For instance, one or two drinks of alcohol will seldom affect the level of phenytoin in any important way, but if a person who does not often consume alcohol drinks a moderate or large amount, the level of phenytoin in the blood may be significantly increased, causing problems with side effects. If you think you have become pregnant while using the medicine, tell your doctor right away. Your doctor will write the number of refills authorized on your prescription. A normal adult dosage may cause levels of phenytoin to be higher than normal in your body.
To help prevent this, brush and floss your teeth carefully and regularly and massage your gums. If you become pregnant while taking this drug, talk to your doctor about registering with the North American Antiepileptic Drug Pregnancy Registry. Using this medicine while you are pregnant can harm your unborn baby.
The most common complaints (usually not too severe) are:If these problems do not go away within several days, or are really bothersome, call the doctor. All possible dosages and forms may not be included here. Don't stop using phenytoin or change the amount taken without talking to the doctor first. The doctor may be able to prescribe a different medicine if phenytoin is causing unpleasant side effects.On July 10, 2008, an advisory panel was convened by the Food and Drug Administration (FDA) to review data that the FDA had previously collected from drug studies showing an association between many of the antiepileptic drugs (AEDs) and suicidal ideation and behavior, which together are called suicidality. This can be harmful or prevent the drug from working well.To help avoid interactions, your doctor should manage all of your medications carefully.
Stopping the medication suddenly may cause an increase in the number or severity of seizures. Examples of these drugs include:Taking other cancer drugs with phenytoin can lower the level of phenytoin in your body.
Most of the time, phenytoin can be taken successfully if the patient works with the doctor to determine the correct amount to take.Any time a doctor suggests a new prescription, be sure to talk about what other medicines, supplements, herbs, and vitamins are already being taken. To find out how this drug might interact with something else you’re taking, talk to your doctor or pharmacist.Examples of drugs that can cause interactions with phenytoin are listed below.Taking these drugs with phenytoin can increase the level of phenytoin in your body.
This may lead to more side effects. It may even cause nonstop seizures that can be life-threatening.
Use the measuring device that comes with phenytoin suspension.
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