• Basic Info
• Top Questions
• Clinical Info
• Interactions

How should I take primidone?

Take this medication exactly as it was prescribed for you. Do not take the medication in larger amounts, or take it for longer than recommended by your doctor. Follow the directions on your prescription label.

Primidone is usually taken 2 to 4 times daily. If you are switching to primidone from another seizure medication, you may need to start taking primidone only at bedtime. Follow your doctor's instructions.

If you are taking primidone to treat seizures, keep taking the medication even if you feel fine. You may have an increase in seizures if you stop taking primidone. Follow your doctor's instructions.

To be sure this medication is helping your condition, your blood may need to be tested on a regular basis. Do not miss any scheduled appointments.

Do not change your dose of primidone without your doctor's advice. Tell your doctor if the medication does not seem to work as well in treating your condition.

Carry an ID card or wear a medical alert bracelet stating that you are taking primidone, in case of emergency. Any doctor, dentist, or emergency medical care provider who treats you should know that you are taking a seizure medication. Store primidone at room temperature away from moisture, light, and heat.

What happens if I miss a dose?

Take the missed dose as soon as you remember. If it is almost time for your next dose, skip the missed dose and take the medicine at your next regularly scheduled time. Do not take extra medicine to make up the missed dose.

What happens if I overdose?

Seek emergency medical attention if you think you have used too much of this medicine.

Symptoms of a primidone overdose are not known.

What should I avoid while taking primidone?

Follow your doctor's instructions about any restrictions on food, beverages, or activity while you are using primidone.

What are the possible side effects of primidone?

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Call your doctor at once if you have any new or worsening symptoms such as: mood or behavior changes, depression, anxiety, or if you feel agitated, hostile, restless, hyperactive (mentally or physically), or have thoughts about suicide or hurting yourself.

Call your doctor at once if you have any of these serious side effects:

• slurred speech;

• loss of balance or coordination;

• easy bruising or bleeding; or

• unusual weakness.

Less serious side effects may include:

• dizziness, drowsiness, spinning sensation;

• nausea, vomiting, loss of appetite;

• feeling irritable;

• blurred vision;

• mild skin rash; or

• impotence, loss of interest in sex.

This is not a complete list of side effects and others may occur. Tell your doctor about any unusual or bothersome side effect.

What other drugs will affect primidone?

There may be other drugs that can interact with primidone. Tell your doctor about all the prescription and over-the-counter medications you use. This includes vitamins, minerals, herbal products, and drugs prescribed by other doctors. Do not start using a new medication without telling your doctor.

Where can I get more information?

Your pharmacist can provide more information about primidone.

Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.

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