What is systemic antacids and Non systemic antacids

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About systemic (absorbable) antacids
 and non systemic antacids 

  These are soluble , readily absorbable and capable of producing systemic electrolyte alterations and alkalosis 

Example- sodium bicarbonate.

Non systemic (non absorbable) antacids : 

 These are not absorbable to a significant extent and thus do not exert on appreciable systemic effect .

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