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Phenacemide oral

Important Note

The following information is intended to supplement, not substitute for, the expertise and judgment of your physician, pharmacist or other healthcare professional. It should not be construed to indicate that use of the drug is safe, appropriate, or effective for you. Consult your healthcare professional before using this drug.





This medication prevents or controls seizures. It is used in the treatment of epilepsy and other seizure disorders.

How To Use

This medication may be taken with food if stomach upset occurs. It is important to take this medication exactly as prescribed. Your dose may be increased during the first several weeks to determine the best dose for you. Do not stop taking this or increase your dose without first consulting your doctor. While taking this medication, your doctor may schedule lab tests to monitor the effectiveness of the medication.

Side Effects

Stomach upset, loss of appetite, headache, dizziness, drowsiness or sleeplessness may occur the first several days as your body adjusts to the medication. Muscle aches and mood changes have also been reported. If any of these effects continue or become bothersome, inform your doctor. Notify your doctor if you develop: fever, sore throat, mouth sores, skin rash, unusual bleeding or bruising, extreme weakness, pale stools, dark urine. Because this medication may cause dizziness or drowsiness, use caution when driving or performing tasks requiring alertness. This medication may cause mood changes. Be aware of this and notify your doctor if you experience: depression, aggression, personality changes. If you notice other effects not listed above, contact your doctor or pharmacist.


Tell your doctor your medical history, especially of: blood disorders, liver problems, kidney problems, mental or emotional problems, allergies. This medication is not recommended for use during pregnancy. Consult your doctor before using this medication. It is not known if this drug passes into breast milk. Consult your doctor before breast-feeding.

Drug Interactions

Tell your doctor all the medicines you take (both prescription and nonprescription) especially of: ethotoin. Do not start or stop any medicine without doctor or pharmacist approval.


If overdose is suspected, contact your local poison control center or emergency room immediately. Symptoms of overdose may include excitement or drowsiness, staggering, dizziness, and loss of consciousness.


Do not share this medication with others. It may harm them.

Missed Dose

Do not double dose if missed, but take it as soon as remembered. If it is almost time for the next dose, skip the missed dose and resume regular dosing schedule.


Store at room temperature away from sunlight and moisture.