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What are antagonistric drug ?...

What are antagonistric drug ?

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Drugs that bind to the receptor site and inhibit its natural function are called antagonist, drugs e.g., cimetidine is an antagonist drug because it binds to the receptor site in stomach otherwise histaine will bind to the receptor site and induce the secreation of HCl in stomach.
Thus, this antacid block the receptor site and hence, the secretion of HCl is reduced thereby reduding/removing/hyperacidity.
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NCERT EXEMPLAR-CHEMISTRY IN EVERYDAY LIFE-Chemistry In Everyday Life
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