Get emergency medical help if you have signs of an allergic reaction to Vimpat: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
Seek medical treatment if you have a serious drug reaction that can affect many parts of your body. Symptoms may include: skin rash, fever, swollen glands, muscle aches, severe weakness, unusual bruising, or yellowing of your skin or eyes.
Report any new or worsening symptoms to your doctor, such as: mood or behavior changes, depression, anxiety, panic attacks, trouble sleeping, or if you feel impulsive, irritable, agitated, hostile, aggressive, restless, hyperactive (mentally or physically), or have thoughts about suicide or hurting yourself.
Call your doctor at once if you have:
a light-headed feeling, like you might pass out;
severe dizziness;
problems with balance or muscle movement;
chest pain, shortness of breath;
fast or pounding heartbeats;
very slow heartbeats; or
dark urine.
Common Vimpat side effects may include:
headache, dizziness;
drowsiness;
double vision; or
nausea.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1 800 FDA 1088.
 Vimpat side effects (more detail)
