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Atenolol is a beta blocker medication primarily used to treat high blood pressure and heart-associated chest pain. Other uses include the prevention of migraines and treatment of certain irregular heart beats. It is taken by mouth or by injection into a vein. It can also be used with other blood pressure medications.Common side effects include feeling tired, heart failure, dizziness, depression, and shortness of breath. Other serious side effects include bronchospasm. Use is not recommended during pregnancy. Other medications are preferred when breastfeeding a young baby. It works by blocking β1-adrenergic receptors in the heart, thus decreasing the heart rate and workload.Atenolol was patented in 1969 and approved for medical use in 1975. It is available as a generic medication. In the United States, the wholesale cost per month is less than 15 USD as of 2018. In the United Kingdom, a month of treatment costs the NHS less than 5 pounds. In 2016, it was the 20th most prescribed medication in the United States, with more than 26 million prescriptions.
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