What is Mysoline (Primidone)?

Primidone is an anti-epileptic drug, also called an anticonvulsant.
Primidone is used to control seizures.
Primidone may also be used for other purposes not listed in this medication guide.

What is the most important information I should know about Mysoline (Primidone)?

You should not use this medication if you are allergic to primidone or phenobarbital (Luminal, Solfoton), or if you have porphyria.
Before taking this medication, tell your doctor if you are allergic to any drugs, or if you are pregnant or breast-feeding.
You may have thoughts about suicide while taking this medication. Your doctor will need to check you at regular visits. Do not miss any scheduled appointments.
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.
If you are taking primidone to prevent 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.

What should I discuss with my healthcare provider before taking Mysoline (Primidone)?

You should not use this medication if you are allergic to primidone or phenobarbital (Luminal, Solfoton), or if you have porphyria.
You may have thoughts about suicide while taking this medication. Tell your doctor if you have new or worsening depression or suicidal thoughts during the first several months of treatment, or whenever your dose is changed.
Your family or other caregivers should also be alert to changes in your mood or symptoms. Your doctor will need to check you at regular visits. Do not miss any scheduled appointments.
Before taking this medication, tell your doctor if you are allergic to any drugs, or if you are pregnant or breast-feeding.
Primidone may cause harm to an unborn baby, but having a seizure during pregnancy could harm both the mother and the baby. Do not start taking primidone during pregnancy without your doctor’s advice.
If you become pregnant while taking primidone, do not stop taking it without telling your doctor. Seizure control is very important during pregnancy and the benefits of preventing seizures may outweigh any risks posed by taking primidone.
If you have taken primidone during pregnancy, be sure to tell the doctor who delivers your baby about your primidone use. Both you and the baby may need to receive medications to prevent excessive bleeding during delivery and just after birth.
Primidone can pass into breast milk and may harm a nursing baby. Do not use this medication without telling your doctor if you are breast-feeding a baby.

Mysoline Side Effects

What are the possible side effects of Mysoline (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. You may report side effects to FDA at 1-800-FDA-1088.

Mysoline Interactions

What other drugs affect Mysoline (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.

What should I avoid while taking Mysoline (Primidone)?

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

Mysoline Dosage

How should I take Mysoline (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 overdose on Mysoline (Primidone)?

Seek emergency medical attention if you think you have used too much of this medicine.
Symptoms of a primidone overdose are not known.

What happens if I miss a dose of Mysoline (Primidone)?

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.
Edited from everydayhealth.com