SN instructed patient / caregiver regarding medication Diovan. Explained that diovan is used to treat high blood pressure ( hypertension ) and heart failure. Explained that the high blood pressure reduction helps prevent strokes, heart attacks, and kidney problems and that this drug works by blocking the hormone angiotensin thereby relaxing blood vessels, causing them to widen. SN explained to patient / caregiver that side effects of this medication includes dizziness, lightheadedness, tiredness, or blurred vision as your body adjusts to the medication. SN instructed that if any of these effects persist or worsen, to notify doctor immediately.