Elderly patients with atrial fibrillation can take calcium supplements if their condition requires it, such as those with osteoporosis. Generally, taking calcium supplements does not affect atrial fibrillation nor does it impact the effectiveness of the medications treating atrial fibrillation. However, calcium supplements themselves do not have an effect on atrial fibrillation and cannot reduce the occurrences of atrial fibrillation episodes. When atrial fibrillation occurs repeatedly, it is necessary to take anticoagulant medications under the guidance of a doctor, such as warfarin or the newer oral anticoagulant medication rivaroxaban, to prevent the formation of blood clots and avoid complications caused by clots from atrial fibrillation. Additionally, if the heart rate is fast, it is appropriate to take medications that control heart rate to improve symptoms.