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Antihistamines

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The drugs which inhibit or reduce the action of histamine in the body thereby preventing allergy are called antihistamines. Histamines interact with the binding sites of the receptor in the body to produces allergy. Antihistamines reduce the secretion of hydrochloric acid by interacting with receptors and histamines in the stomach wall.
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I.Drug action is based on a particular biochemical process II.Antihistamines inhibit the action of the compound histamines which cause allergies III.Drugs interact with macromolecular targets and produce a biological response which of the above statement is correct choose the appropriate option

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