Primidone: What is it? How to use? Warnings, Side Effects and Storage

It is a medicine administered alone or with other medications to control certain seizures.

Primidone belongs to the group of anticonvulsant medications. It works by decreasing the abnormal electrical activity of the brain.


Tell all of your health care providers that you take this medication. This includes your doctors, nurses, pharmacists, and dentists. Avoid driving and doing other tasks or actions that require you to be alert until you see how Primidone affects you.

Do not stop taking this medication suddenly without calling your doctor. You may have an increased risk of seizures. If you need to stop taking this medication, you should stop taking it slowly as directed by your doctor. It may take several weeks to see the full effects.

Have a blood test as told by the doctor. Before drinking alcohol or using other drugs and natural products, talk to the doctor that decreases your actions.

The anemia, low white blood cell count, and low platelet count time rarely occur. Birth control pills and other contraceptive methods based on hormones may not work as well in preventing pregnancy.

Use another type of contraceptive as well as a condom when taking Primidone. This medication can harm the unborn baby. Call your doctor immediately if you take it while pregnant or become pregnant while taking this medication.


What should I tell my doctor BEFORE taking Primidone?

If you are allergic to Primidone, phenobarbital, or any other part of Primidone.

Suppose you are allergic to any drug like this, other drugs, food, or other substances. Tell your doctor about the allergy and the signs you had, such as rash, hives,  itching, difficulty breathing, wheezing, cough, swelling of the face, lips, tongue, throat, or any other sign.

If you have porphyria if you are breastfeeding or plan to breastfeed.

This is not a list of all medications or health problems that interact with this medication. Tell your doctor about all your medicines (prescription or over-the-counter), natural products, vitamins, and health problems.

How to use it?

  • Use Primidone as ordered by your doctor.
  • Follow all instructions closely.
  • It can be taken with or without food.
  • Take with food if it upsets your stomach.

Continue to take this medication as directed by your doctor or other health care provider, even if you feel well. What do I do if I miss a dose? Take the missed dose as soon as you think about it. Do not take two doses at the same time or in additional amounts.

Side effects

Some people can have severe and sometimes fatal side effects when taking a medication.

Tell your doctor or seek medical attention immediately if you have any of the following signs or symptoms that may be related to a severe side effect.

Signs of an allergic reaction such as:

  • Eruption.
  • Urticaria
  • Itch
  • Red, swollen, blistered, or peeling skin with or without fever.
  • Wheezing
  • Pressure in the chest or throat.
  • Difficulty breathing, swallowing or speaking.
  • Unusual hoarseness
  • Swelling of the mouth, face, lips, tongue, or throat.

Signs of infection such as:

  • Fever.
  • Shaking chills.
  • Very intense throat pain.
  • Pain in the ears or sinuses.
  • Tos.
  • Changes in sputum color
  • Pain when urinating.
  • Wounds that do not heal.
  • Sexual impotence
  • Changes in the view
  • Feeling very tired or weak
  • If the seizures are worse or are not the same after starting with Primidone.
  • Swollen gland
  • Short of breath.

Patients taking this medication may be at higher risk of suicidal thoughts or actions. The risk may be higher in people who have had these thoughts or actions.

Call the doctor immediately if the signs of a bad mood ( depression ), nervousness, restlessness, lousy mood, attacks of panic, or changes in the air. Call the doctor immediately if you have thoughts or suicidal actions.

What are some other side effects of Primidone?

Many people have no side effects or only have minor side effects. Call your doctor or seek medical help if any of these side effects or any other side effect bothers you or does not go away:

  • Dizziness.
  • Stomach upset or vomiting
  • No hunger
  • He feels tired or weak.
  • Somnolent.


Call your poison control center or get medical attention if you think there has been an overdose. Prepare to tell or show what was taken, how much, and when.

How do I store and delete Primidone?

Store at room temperature. Store in a dry place. Do not store it in a bathroom. Keep all drugs in a safe place. Keep all drugs out of the reach of children and pets.

Throw away unused or expired drugs. Do not flush the toilet or pour it down a drain unless instructed. Check with your pharmacist if you have questions about the best way to throw away drugs.

Have a list of all your medications (prescription drugs, natural products, vitamins, and OTC medications).