It is very important that your doctor check your progress at regular visits to make sure that this medicine is working properly. Blood and urine tests may be needed to check for unwanted effects.
Using this medicine while you are pregnant can harm your unborn baby. Use an effective form of birth control to keep from getting pregnant. If you think you have become pregnant while using the medicine, tell your doctor right away.
Do not use this medicine if you are also using cyclosporine (Gengraf®, Neoral®, Sandimmune®), ritonavir (Norvir®), medicine for depression (such as amitriptyline, nefazodone, nortriptyline, Elavil®, Serzone®), medicine for heart rhythm problems (such as amiodarone, disopyramide, dofetilide, flecainide, propafenone, quinidine, sotalol, Cardioquin®, Cordarone®, Norpace®, Tikosyn®), medicine for infections (such as clarithromycin, erythromycin, itraconazole, ketoconazole, telithromycin, voriconazole, Ery-tab®, Nizoral®, Vfend®), or a phenothiazine medicine (such as chlorpromazine, prochlorperazine, promethazine, thioridazine, Compazine®, Mellaril®, Phenergan®, Thorazine®, Trilafon®). Using these medicines together may cause serious side effects.
Check with your doctor right away if you develop any of the following: chest pain, shortness of breath, swelling of your hands, ankles, or feet, or weight gain. These may be symptoms of heart failure.
This medicine can cause changes in your heart rhythm, such as a condition called QT prolongation. It may cause fainting or serious side effects in some patients. Contact your doctor right away if you have any symptoms of heart rhythm problems, such as fast, pounding, or irregular heartbeats.
Check with your doctor right away if you have upper stomach pain, pale stools, dark urine, loss of appetite, nausea, unusual tiredness, or yellow eyes or skin. These could be symptoms of a serious liver problem.
Tell your doctor right away if you are having shortness of breath, chest tightness, or any type of breathing problem while being treated with this medicine.
This medicine may increase risk for heart attack, stroke, or other serious side effects. Talk to your doctor about whether you should continue to take this medicine for paroxysmal or persistent atrial fibrillation.
Do not stop taking this medicine without first checking with your doctor.
Grapefruits and grapefruit juice may increase the side effects from dronedarone by increasing the amount of this medicine in your body. You should not eat grapefruit or drink grapefruit juice while you are using this medicine.
Do not take other medicines unless they have been discussed with your doctor. This includes prescription or nonprescription (over-the-counter [OTC]) medicines and herbal (e.g., St. John's wort) or vitamin supplements.