How Toprol-XL works
If you've been prescribed a twice-daily metoprolol tartrate for high blood pressure, but would prefer the convenience of a once-daily dose, ask your doctor about prescribing Toprol-XL.
Toprol-XL is a specially designed extended-release tablet that belongs to a family of medications known as beta-blockers. Extended-release tablets need to be taken only once a day. After swallowing, the coating of the tablet dissolves, releasing hundreds of pellets filled with medication. These pellets slowly disintegrate in your digestive tract, delivering medicine to your body, where it works for 24 hours. This is different from immediate-release metoprolol medications that are short-acting and require 2 or more doses a day.
What are beta-blockers?
Every cell in the heart muscle has what are known as receptors. When you are under stress or excited, your body releases certain chemicals, such as adrenaline. These chemicals attach to the receptors in your heart, causing your heart to work faster and harder and increasing your blood pressure. Beta-blockers are used to help prevent adrenaline from attaching to these receptors, which, in turn, helps keep your heart rate and blood pressure under control.