Question 65

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

When ciprofloxacin tablets are taken with milk, the calcium present can bind to the antibiotic, leading to a decrease in its absorption into the bloodstream. This interaction can significantly affect the effectiveness of the medication.

A) Absorption

This option is correct because the presence of calcium in milk can chelate with ciprofloxacin, preventing its proper absorption in the gastrointestinal tract. Consequently, this reduces the overall bioavailability of the antibiotic, which is crucial for its therapeutic effect.

B) Distribution

Distribution refers to how a drug disperses throughout the body's fluids and tissues. The administration of ciprofloxacin with milk does not directly affect the distribution phase, as this process occurs after the drug has been absorbed into the bloodstream.

C) Metabolism

Metabolism involves the chemical alteration of a drug in the body, typically occurring in the liver. Milk does not influence the metabolic pathways of ciprofloxacin, so this option is incorrect in the context of the interaction highlighted in the question.

D) Excretion

Excretion is the process by which drugs are eliminated from the body, primarily through the kidneys. Since the interaction with milk primarily affects the absorption phase, it does not have a significant impact on the excretion of ciprofloxacin.

Conclusion

In summary, the interaction between ciprofloxacin and milk primarily inhibits absorption due to calcium binding, making Option A the definitive correct answer. The other options do not accurately represent the pharmacokinetic processes impacted by this specific interaction. Understanding these interactions is crucial for optimizing the effectiveness of antibiotic therapy.