The 1st stamp on the left is from 2010 Medical Breakthrough issue illustrating Heart-regulating beta blockers synthesised by Sir James Black,1962.
Beta blockers are used for various indications, but particularly for the management of cardiac arrhythmias, cardioprotection after myocardial infarction (heart attack), and hypertension. Propranolol was the first clinically useful beta adrenergic receptor antagonist. Invented by Sir James W. Black in the late 1950s, it revolutionized the medical management of angina pectoris and is considered to be one of the most important contributions to clinical medicine and pharmacology of the 20th century.
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