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Salmeterol is a long-acting beta2-adrenoceptor agonist (LABA), used in moderate to severe persistent asthma following previous treatment with a short-acting beta2-adrenoceptor agonist (SABA) such as salbutamol (albuterol).he primary noticeable difference of salmeterol from salbutamol, and other short-acting beta2-adrenoceptor agonists (SABAs), is its duration of action. Salmeterol lasts approximately 12 hours in comparison with the salbutamol, which last about 4â6 hours.
Metoprolol tartrate is approved to control high blood pressure, treat angina symptoms, and improve survival after a heart attack. Metoprolol tartrate (LopressorÂ®) is a prescription medicine that has been licensed to treat several conditions related to the heart and blood vessels. It is part of a class of drugs called beta blockers.