Question 13

Administration of ciprofloxacin tablets with milk could cause the inhibition of absorption.

Ciprofloxacin tablets taken with milk can inhibit the absorption of the medication due to the presence of calcium in milk, which binds to ciprofloxacin and reduces its bioavailability.

A) Absorption

This option is correct because the calcium present in milk can chelate with ciprofloxacin, forming insoluble complexes that decrease the drug's absorption in the gastrointestinal tract. This results in lower plasma concentrations of the antibiotic, potentially reducing its effectiveness.

B) Distribution

This option is incorrect as distribution refers to the process by which a drug disperses throughout the fluids and tissues of the body after it has been absorbed. The presence of milk does not influence the distribution of ciprofloxacin once it is in the bloodstream.

C) Metabolism

This option is also incorrect since metabolism occurs after the absorption of a drug, primarily in the liver. Milk does not affect the metabolic processes of ciprofloxacin, meaning its breakdown and conversion in the body remains unchanged.

D) Excretion

This option is incorrect as well, as excretion involves the elimination of the drug from the body, typically through urine. The presence of milk does not impact how ciprofloxacin is excreted, so this process remains unaffected.

Conclusion

The inhibition of absorption by the administration of ciprofloxacin with milk is the critical pharmacokinetic process affected, as evidenced by the interaction between calcium and the drug. Other processes such as distribution, metabolism, and excretion are not influenced by milk, making them incorrect choices in this context. Understanding this interaction is essential for optimizing the therapeutic efficacy of ciprofloxacin.