Possible Side Effects

• Increased potassium levels in your blood (hyperkalemia). Your risk of developing hyperkalemia is increased if you are 65 years of age or older, have diabetes or kidney problems, or if you take other medicines that can increase potassium levels. Talk to your healthcare provider before using potassium supplements or salt substitutes that contain potassium during your treatment with BAXFENDY.
• Decreased sodium levels in your blood (hyponatremia). Your risk of developing hyponatremia is increased if you already have a low sodium blood level or take medicine that may cause hyponatremia. Tell your healthcare provider right away if you have any symptoms of low sodium levels during treatment. Symptoms of low sodium levels in your blood may include unusual fatigue, dizziness, headache, shortness of breath, or confusion.

Your healthcare provider will check potassium and sodium levels in your blood before treatment with BAXFENDY and periodically during your treatment. Your healthcare provider may temporarily stop your treatment with BAXFENDY if you develop high potassium or low sodium levels in your blood.

The most common side effect is hyperkalemia. Other common side effects include low blood pressure, dizziness, and muscle spasms.