• Basic Info
• Top Questions
• Interactions

Before taking cycloserine, tell your doctor if you are taking

• ethionamide (Trecator-SC), or

• isoniazid (Nydrazid).

You may require a dosage adjustment or special monitoring if you are taking any of the medicines listed above.

Drugs other than those listed here may also interact with cycloserine. Talk to your doctor and pharmacist before taking any prescription or over-the-counter medicines.

If you experience any of the following serious side effects, seek emergency medical attention or contact your doctor immediately:

• an allergic reaction (difficulty breathing; closing of your throat; swelling of your lips, tongue, or face; or hives);

• seizures;

• numbness or tingling in your hands or feet;

• a skin rash;

• confusion or abnormal behavior;

• tremors (shaking);

• headache;

• drowsiness;

• dizziness;

• difficulty speaking; or

• irritability.

Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome.