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• Interactions

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.

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.