Yes, a systolic blood pressure above 260 mmHg is a life-threatening medical emergency known as a hypertensive crisis. This extreme level puts you at immediate risk for a stroke, heart attack, or severe organ damage. You must seek emergency medical care immediately by calling 911 or going to the nearest emergency room. Do not attempt to self-medicate with oral pills at home, as lowering blood pressure too rapidly can also be dangerous. In the hospital, doctors will safely manage and lower your blood pressure using fast-acting intravenous (IV) medications under continuous, precise medical supervision.