Difficulty: Medium

Average Score: 58%

Which of the following products should remain stable until the manufacturers printed expiration date?

Rationale

An unreconstituted bottle of clarithromycin stored at room temperature should remain stable until the manufacturers printed expiration date.

Unreconstituted clarithromycin is a stable antibiotic in its original packaging, and when stored at room temperature, it maintains its efficacy until the expiration date indicated by the manufacturer.

A (An unreconstituted bottle of clarithromycin stored at room temperature) CORRECT

This choice is correct because unreconstituted clarithromycin is designed to be stable until its expiration date when stored properly. It does not require refrigeration, and its stability at room temperature ensures that it retains its potency throughout its shelf life.

B (A vial of Humalog stored in the freezer) YOUR ANSWER

Humalog, an insulin product, should never be frozen as freezing can cause it to lose potency and effectiveness. It is recommended to be stored in a refrigerator, and exposure to freezing temperatures can lead to degradation, making this option unreliable for stability.

C (A vial of Varivax stored under refrigeration) YOUR ANSWER

While Varivax (the varicella vaccine) is stable under refrigeration, it is sensitive to temperature changes and requires strict adherence to storage guidelines. If stored improperly or past its expiration date, its efficacy can diminish, making it less stable than the unreconstituted clarithromycin at room temperature.

D (An open bottle of doxazosin that has been exposed to moisture) YOUR ANSWER

Doxazosin is sensitive to moisture, and exposure can lead to degradation of the medication. An open bottle is not only compromised in terms of stability but also may not be effective, as humidity can affect its chemical integrity significantly.

Conclusion

Stability of pharmaceuticals is crucial for ensuring their effectiveness, and in this case, an unreconstituted bottle of clarithromycin stored at room temperature remains the best option until its expiration date. Other choices either involve improper storage conditions or exposure to factors that compromise their stability, leading to potential ineffectiveness.

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