Before you begin taking a medication, be sure to inform your doctor of any medical conditions or Allergies you may have, any medications you are taking, whether you are pregnant or breast-feeding, and any other significant facts about your health. These factors may affect how you should take Tambocor (Flecainide).
Abnormal heart rhythms: Certain medications used to treat abnormal heart rhythms, including Tambocor (Flecainide), may cause new abnormal heart rhythms or worsen existing ones. Your doctor will monitor you closely while you are taking Tambocor (Flecainide). If you experience a fast, slow, or irregular heartbeat; fainting; heart palpitations; or dizziness while taking Tambocor (Flecainide), contact your doctor immediately.
Drowsiness/reduced alertness: Tambocor (Flecainide) may cause blurred vision, dizziness, and fatigue. Do not drive or operate machinery until you know how Tambocor (Flecainide) affects you.
Heart failure: Tambocor (Flecainide) can cause or worsen heart failure and should not be used by people with severe or untreated heart failure. If you have heart failure and are taking Tambocor (Flecainide), your doctor will monitor you closely during treatment. If you notice shortness of breath, weight gain, or swelling in the hands, feet, or lower legs while taking Tambocor (Flecainide), contact your doctor immediately. People who have had a Heart Attack may also develop these symptoms.
Kidney function: Decreased kidney function or Kidney Disease may cause Tambocor (Flecainide) to build up in the body, causing side effects. If you have decreased kidney function, discuss with your doctor how Tambocor (Flecainide) may affect your medical condition, how your medical condition may affect the dosing and effectiveness of Tambocor (Flecainide), and whether any special monitoring is needed.
Liver function: Decreased liver function or liver disease may cause Tambocor (Flecainide) to build up in the body, causing side effects. If you have decreased liver function, discuss with your doctor how Tambocor (Flecainide) may affect your medical condition, how your medical condition may affect the dosing and effectiveness of Tambocor (Flecainide), and whether any special monitoring is needed.
Pregnancy: Tambocor (Flecainide) should not be used during pregnancy unless the benefits outweigh the risks. If you become pregnant while taking Tambocor (Flecainide), contact your doctor immediately.
Breast-feeding: Tambocor (Flecainide) passes into breast milk. If you are a breast-feeding mother and are taking Tambocor (Flecainide), it may affect your baby. Talk to your doctor about whether you should continue breast-feeding.
Children: The safety and effectiveness of using Tambocor (Flecainide) have not been established for children.