Labetalol is a beta-blocker. It is used to treat hypertension. It is not approved for use by patients under 18.

Inform your doctor of your medical history before using. Also inform your doctor if you become pregnant or breast-feed. Do not stop taking this medication suddenly. Inform all medical personnel you take this medication, especially before undergoing a surgery or lab test. If you miss a dose, skip it if your next dose is less than 8 hours away; otherwise, take the skipped dose as soon as you remember.

Labetalol should not be used by patients who have asthma, COPD, very low blood pressure, a serious heart condition, severe heart failure, or slow heartbeats. Use caution when driving or doing anything that requires alertness. Avoid getting up too quickly. Alcohol may increase side effects and further lower blood pressure. Labetalol may interact with other drugs, so inform your doctor of other drugs you take.

Find emergency help if you suspect an allergic reaction or overdose. Overdose may look like slow pulse, extreme dizziness, and fainting. Contact your doctor immediately if you encounter serious side effects, such as: lightheadedness, slow or weak pulse, slow breathing, shortness of breath, swelling, rapid weight gain, signs of a liver problem, or signs of dangerously high blood pressure. More common side effects include: dizziness, upset digestion, congestion, and tingliness on scalp.