What HAPPENS to antibiotics AFTER THEY ENTER the body?

Benzylpenicillin, carboxypenicillins and ureidopenicillins largely lose their properties when taken orally under the action of hydrochloric acid of gastric juice, for this reason they are administered only intramuscularly. Phenoxymethylpenicillin, oxacillin and aminopenicillins are more stable in an acidic environment, and therefore can be administered orally. A very high degree of absorption in the gastrointestinal tract…

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