84. Which of the following products should remain stable until the manufacturer's printed expiration date?
Answer: D
An unreconstituted bottle of azithromycin stored at room temperature should remain stable until the manufacturer's printed expiration date.
Unreconstituted azithromycin, when stored at room temperature, maintains its stability and efficacy until the expiration date indicated by the manufacturer.
A) A vial of Humalog stored in the freezer
Insulin, including Humalog, should not be frozen as freezing can damage the insulin molecules, rendering it ineffective. Therefore, a vial of Humalog stored in the freezer would not remain stable until its expiration date.
B) A vial of Varivax stored under refrigeration
While Varivax should be stored under refrigeration, vaccines typically have specific storage requirements and may not remain stable if not adhered to strictly. Although refrigeration is generally acceptable, the stability until expiration is not guaranteed if there are fluctuations or prolonged exposure outside the recommended conditions.
C) An unopened bottle of doxazosin stored in a patient's bathroom
Storing medications in a bathroom can expose them to humidity and temperature changes, which may compromise their stability. Doxazosin may not remain effective until its printed expiration date if stored in such an unsuitable environment.
D) An unreconstituted bottle of azithromycin stored at room temperature
Azithromycin in its unreconstituted form is stable when stored at room temperature. This allows it to remain effective and maintain its potency until the manufacturer's expiration date, making it the correct choice.
Conclusion
The correct answer is D, as unreconstituted azithromycin is specifically designed to be stable at room temperature until its expiration date. In contrast, the other options involve improper storage conditions that can lead to instability and reduced effectiveness of the respective medications.