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Fosphenytoin Coupon - Fosphenytoin twenty-five 2ml vials of 100mg PE/2ml carton

fosphenytoin

Generic Cerebyx
Used for Epilepsy

Fosphenytoin (Cerebyx) is an injectable medication used to treat and prevent seizures in both children and adults. This medication has many risks and possible side effects, including uncontrolled eye movements, dizziness, and trouble moving your muscles. Fosphenytoin (Cerebyx) is typically given by a healthcare provider.

Reviewed by:
reviewerKristianne Hannemann, PharmD
reviewerAllison Gourley, PharmD
Last reviewed on September 18, 2022
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What is Fosphenytoin (Cerebyx)?

What is Fosphenytoin (Cerebyx) used for?

  • To treat or prevent seizures

Drug facts

Common BrandsCerebyx
Drug ClassAntiepileptic
Controlled Substance ClassificationNot a controlled medication
Generic StatusNo lower-cost generic available
AvailabilityPrescription only
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Common questions about Fosphenytoin (Cerebyx)

Fosphenytoin (Cerebyx) is an injectable antiseizure medication that's used to prevent and treat seizures during neurosurgery (brain surgery) in children and adults. It's also used to treat tonic-clonic status epilepticus, which is a type of seizure that's repeated or lasts 5 minutes or longer. Additionally, fosphenytoin (Cerebyx) can be temporarily used in place of oral phenytoin (Dilantin), when you can't take anything by mouth.

After fosphenytoin (Cerebyx) is injected, your body changes it into the active medication phenytoin. It's not fully known how phenytoin works for seizures, but researchers think it lowers abnormal signals between nerve cells in the brain.

Fosphenytoin (Cerebyx) is typically infused into the veins (intravenous or IV) by a healthcare provider. In some cases, your provider might give it as an injection into the muscles. Your dose depends on things like your body weight and your response to the medication. Your provider will make sure you get the right fosphenytoin (Cerebyx) dose at the right time.

The most common side effects in adults are itching, uncontrolled eye movements, dizziness, drowsiness, and problems controlling your muscles. In children, the most common side effects are vomiting, uncontrolled eye movements, and problems controlling their muscles. Some people have reported severe burning and/or a "pins and needles" feeling after getting fosphenytoin (Cerebyx). In most cases, this went away within a day. Your provider might be able to slow down or stop your infusion to help improve these symptoms. In rare cases, some people have experienced swelling, discoloration (color changes), and pain at the injection site ("purple glove syndrome"). Sometimes, these symptoms appear several days after the injection.

Yes. Fosphenytoin (Cerebyx) can cause serious heart problems, like low blood pressure and abnormal heart rhythm. The risk is higher when it's given too quickly. For your safety, your provider will monitor your heart and breathing while you're getting this medication. In addition, fosphenytoin (Cerebyx) can cause serious allergic reactions. These can include life-threatening skin reactions, swelling, and anaphylaxis (closing of the throat). Get medical help right away if you notice fever, rash, swelling in your face, or trouble breathing. Fosphenytoin (Cerebyx) can also raise your blood sugar levels, cause liver damage, and affect your blood cell counts.

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Fosphenytoin (Cerebyx) dosage

Typical dosage for Fosphenytoin (Cerebyx)

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Interactions between Fosphenytoin (Cerebyx) and other drugs

Fosphenytoin (Cerebyx) may interact with certain medications or supplements. Always let your doctor and pharmacist know about any other medications or supplements (including prescribed and over-the-counter medications, vitamins, and dietary or herbal supplements) that you are currently taking. The list below does not include all possible drug interactions with Fosphenytoin (Cerebyx). Please note that only the generic name of each medication is listed below.

Although certain medicines should not be used together at all, in other cases two different medicines may be used together even if an interaction might occur. In these cases, your doctor may want to change the dose, or other precautions may be necessary. When you are receiving this medicine, it is especially important that your healthcare professional know if you are taking any of the medicines listed below. The following interactions have been selected on the basis of their potential significance and are not necessarily all-inclusive.

Using this medicine with any of the following medicines is not recommended. Your doctor may decide not to treat you with this medication or change some of the other medicines you take.

Using this medicine with any of the following medicines is usually not recommended, but may be required in some cases. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.

Using this medicine with any of the following medicines may cause an increased risk of certain side effects, but using both drugs may be the best treatment for you. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.

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Fosphenytoin (Cerebyx) images

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This medicine is Yellow Carton.yellow - Fosphenytoin Sodium 500mg PE/10mL Solution for Injection (NOVAPLUS)
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This medicine is Yellow Carton.yellow - Fosphenytoin Sodium 500mg PE/10mL Solution for Injection (NOVAPLUS)

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