SN instructed patient / caregiver about the medication Isosorbide. SN explained that Isosorbide is a medication given to reduce the blood pressure and that it also reduces the heart rate. SN explained that the side effects of this medication includes fatigue, anxiety, weakness, dizziness, tachycardia, pulmonary edema, constipation and dry mouth. SN instructed patient / caregiver to notify physician ( MD ) if experiencing persistence of side effects or if experiencing blurred vision, difficulty breathing, wheezing, dizziness, light - headedness, confusion, depression or dry mouth.