(Phenytoin Chewable Tablets, USP)
Read this Medication Guide before you start taking PHENYTOIN INFATABS and each time you get a refill. There may be new information.
This information does not take the place of talking to your healthcare provider about your medical condition or treatment.
If you have any questions about PHENYTOIN INFATABS, ask your healthcare provider or pharmacist.
What is the most important information I should know about PHENYTOIN INFATABS?
Do not stop taking PHENYTOIN INFATABS without first talking to your healthcare provider.
Stopping PHENYTOIN INFATABS suddenly can cause serious problems.
PHENYTOIN INFATABS can cause serious side effects including:
- Like other antiepileptic drugs, PHENYTOIN INFATABS may cause suicidal thoughts or actions in a very small number of people,
about 1 in 500.
Call a healthcare provider right away if you have any of these symptoms, especially if they are new, worse, or worry you:
- thoughts about suicide or dying
- attempts to commit suicide
- new or worse depression
- new or worse anxiety
- feeling agitated or restless
- panic attacks
- trouble sleeping (insomnia)
- new or worse irritability
- acting aggressive, being angry, or violent
- acting on dangerous impulses
- an extreme increase activity and talking (mania)
- other unusual changes in behavior or mood
How can I watch for early symptoms of suicidal thoughts and actions?
- Pay attention to any changes, especially sudden changes, in mood, behaviors, thoughts, or feelings.
- Keep all follow-up visits with your healthcare provider as scheduled.
Call your healthcare provider between visits as needed, especially if you are worried about symptoms.
Do not stop taking PHENYTOIN INFATABS without first talking to a healthcare provider.
- Stopping PHENYTOIN INFATABS suddenly can cause serious problems. Stopping a seizure medicine suddenly in a patient who has
epilepsy can cause seizures that will not stop (status epilepticus).
Suicidal thoughts or actions can be caused by things other than medicines. If you have suicidal thoughts or actions, your
healthcare provider may check for other causes.
- PHENYTOIN INFATABS may harm your unborn baby.
- If you take PHENYTOIN INFATABS during pregnancy, your baby is at risk for serious birth defects.
- Birth defects may occur even in children born to women who are not taking any medicines and do not have other risk factors
- If you take PHENYTOIN INFATABS during pregnancy, your baby is also at risk for bleeding problems right after birth. Your
healthcare provider may give you and your baby medicine to prevent this.
- All women of child-bearing age should talk to their healthcare provider about using other possible treatments instead of PHENYTOIN
INFATABS. If the decision is made to use PHENYTOIN INFATABS, you should use effective birth control (contraception) unless
you are planning to become pregnant.
- Tell your healthcare provider right away if you become pregnant while taking PHENYTOIN INFATABS. You and your healthcare
provider should decide if you will take PHENYTOIN INFATABS while you are pregnant.
- Pregnancy Registry: If you become pregnant while taking PHENYTOIN INFATABS, talk to your healthcare provider about registering
with the North American Antiepileptic Drug Pregnancy Registry. You can enroll in this registry by calling 1-888-233-2334.
The purpose of this registry is to collect information about the safety of antiepileptic drugs during pregnancy.
- Swollen glands (lymph nodes)
- Allergic reactions or serious problems which may affect organs and other parts of your body like the liver or blood cells.
You may or may not have a rash with these types of reactions. Symptoms can include any of the following:
- swelling of your face, eyes, lips, or tongue
- trouble swallowing or breathing
- a skin rash
- fever, swollen glands, or sore throat that do not go away or come and go
- painful sores in the mouth or around your eyes
- yellowing of your skin or eyes
- unusual bruising or bleeding
- severe fatigue or weakness
- severe muscle pain
- frequent infections or an infection that does not go away
- loss of appetite (anorexia)
- nausea or vomiting
Call your healthcare provider right away if you have any of the symptoms listed above.
What is PHENYTOIN INFATABS?
PHENYTOIN INFATABS is a prescription medicine used to treat tonic-clonic (grand mal), complex partial (psychomotor or temporal
lobe) seizures, and to prevent and treat seizures that happen during or after brain surgery.
Who should not take PHENYTOIN INFATABS?
Do not take PHENYTOIN INFATABS if you:
- are allergic to PHENYTOIN INFATABS or any of the ingredients in PHENYTOIN INFATABS. See the end of this leaflet for a complete
list of ingredients in PHENYTOIN INFATABS.
- have had an allergic reaction to CEREBYX (fosphenytoin), PEGANONE (ethotoin), or MESANTOIN (mephenytoin).
- take delavirdine
What should I tell my healthcare provider before taking PHENYTOIN INFATABS?
Before you take PHENYTOIN INFATABS, tell your healthcare provider if you:
- Have or had liver disease
- Have or had porphyria
- Have or had diabetes
- Have or have had depression, mood problems, or suicidal thoughts or behavior
- Are pregnant or plan to become pregnant.
- If you become pregnant while taking PHENYTOIN INFATABS, the level of PHENYTOIN INFATABS in your blood may decrease, causing
your seizures to become worse. Your healthcare provider may change your dose of PHENYTOIN INFATABS.
- Are breast feeding or plan to breastfeed. PHENYTOIN INFATABS can pass into breast milk. You and your healthcare provider
should decide if you will take PHENYTOIN INFATABS or breastfeed. You should not do both.
Tell your healthcare provider about all the medicines you take, including prescription and non-prescription medicines, vitamins, and herbal supplements.
Taking PHENYTOIN INFATABS with certain other medicines can cause side effects or affect how well they work. Do not start or
stop other medicines without talking to your healthcare provider.
Know the medicines you take. Keep a list of them and show it to your healthcare provider and pharmacist when you get a new
How should I take PHENYTOIN INFATABS?
- Take PHENYTOIN INFATABS exactly as prescribed. Your healthcare provider will tell you how much PHENYTOIN INFATABS to take.
- Your healthcare provider may change your dose. Do not change your dose of PHENYTOIN INFATABS without talking to your healthcare
- PHENYTOIN INFATABS can cause overgrowth of your gums. Brushing and flossing your teeth and seeing a dentist regularly while
taking PHENYTOIN INFATABS can help prevent this.
- If you take too much PHENYTOIN INFATABS, call your healthcare provider or local Poison Control Center right away.
- Do not stop taking PHENYTOIN INFATABS without first talking to your healthcare provider. Stopping PHENYTOIN INFATABS suddenly
can cause serious problems.
What should I avoid while taking PHENYTOIN INFATABS?
Do not drink alcohol while you take PHENYTOIN INFATABS without first talking to your healthcare provider. Drinking alcohol
while taking PHENYTOIN INFATABS may change your blood levels of PHENYTOIN INFATABS which can cause serious problems.
Do not drive, operate heavy machinery, or do other dangerous activities until you know how PHENYTOIN INFATABS affects you.
PHENYTOIN INFATABS can slow your thinking and motor skills.
What are the possible side effects of PHENYTOIN INFATABS?
See "What is the most important information I should know about PHENYTOIN INFATABS?"
PHENYTOIN INFATABS may cause other serious side effects including:
- Softening of your bones (osteopenia, osteoporosis, osteomalacia). This can cause broken bones.
Call your healthcare provider right away, if you have any of the symptoms listed above.
The most common side effects of PHENYTOIN INFATABS include:
- problems with walking and coordination
- slurred speech
- trouble sleeping
These are not all the possible side effects of PHENYTOIN INFATABS. For more information, ask your healthcare provider or
Tell your healthcare provider if you have any side effect that bothers you or that does not go away.
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
How should I store PHENYTOIN INFATABS?
- Store PHENYTOIN INFATABS at room temperature between 68°F to 77°F (20°C to 25°C). Protect from moisture.
Keep PHENYTOIN INFATABS and all medicines out of the reach of children.
General information about PHENYTOIN INFATABS
Medicines are sometimes prescribed for purposes other than those listed in a Medication Guide. Do not use PHENYTOIN INFATABS
for a condition for which it was not prescribed. Do not give PHENYTOIN INFATABS to other people, even if they have the same
symptoms that you have. It may harm them.
This Medication Guide summarizes the most important information about PHENYTOIN INFATABS. If you would like more information,
talk with your healthcare provider. You can ask your healthcare provider or pharmacist for information about PHENYTOIN INFATABS
that was written for healthcare professionals.
For more information about PHENYTOIN INFATABS, call 1-800-438-1985.
What are the ingredients in PHENYTOIN INFATABS?
Each tablet is a yellow triangular scored chewable tablet.
Active ingredient: 50 mg phenytoin USP
Inactive ingredients: D & C yellow No. 10, A1 lake, FD&C yellow No. 6, flavor, saccharin sodium, confectioner's sugar, talc,
magnesium stearate, and purified water.
This Medication Guide has been approved by the U.S. Food and Drug Administration.