What are the possible side effects of methsuximide?
Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Report any new or worsening symptoms to your doctor, such as: mood or behavior changes, anxiety, panic attacks, trouble sleeping, or if you feel impulsive, irritable, agitated, hostile, aggressive, restless, hyperactive (mentally or physically), depressed, or have thoughts about suicide or hurting yourself.
Serious and sometimes fatal infections may occur during treatment with methsuximide. Call your doctor right away if you have signs of infection such as:
- fever;
- swollen glands, sore throat;
- easy bruising, unusual bleeding (nose, mouth); or
- feeling very weak or tired.
Also call your doctor at once if you have:
- confusion, hallucinations, unusual thoughts or behavior, extreme fear;
- worsening seizures;
- lupus-like syndrome --joint pain or swelling with fever, swollen glands, muscle aches, chest pain, vomiting, unusual thoughts or behavior, and patchy skin color; or
- severe skin reaction --fever, sore throat, swelling in your face or tongue, burning in your eyes, skin pain followed by a red or purple skin rash that spreads (especially in the face or upper body) and causes blistering and peeling.
Common side effects may include:
- nausea, vomiting, stomach pain, loss of appetite;
- diarrhea, constipation;
- weight loss;
- headache, dizziness, drowsiness;
- blurred vision; or
- loss of balance or coordination.
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.
