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.
Azithromycin, when stored in its unreconstituted form at room temperature, is designed to maintain its stability and effectiveness up until the manufacturer's expiration date.
A) A vial of Humalog stored in the freezer
Humalog, which is a rapid-acting insulin, should not be frozen as this can cause it to become ineffective. Storing Humalog in the freezer would likely compromise its stability and alter its efficacy, making it unsafe for use.
B) A vial of Varivax stored under refrigeration
While Varivax, a vaccine for varicella (chickenpox), should be stored in a refrigerator to maintain its effectiveness, it is sensitive to temperature variations. If not stored correctly or if it is close to its expiration date, it may not remain stable, which contradicts the question's requirement for stability until the expiration date.
C) An unopened bottle of doxazosin stored in a patient's bathroom
Doxazosin, an antihypertensive medication, should be stored in a cool, dry place. The bathroom typically experiences humidity and fluctuating temperatures, which can affect the stability of the medication, potentially making it less effective before the expiration date.
D) An unreconstituted bottle of azithromycin stored at room temperature
Azithromycin in its unreconstituted form is stable at room temperature and is designed to remain effective until the expiration date provided by the manufacturer. This storage condition is appropriate for this medication, ensuring its efficacy.
Conclusion
The correct answer is D, as azithromycin's stability is maintained when stored unreconstituted at room temperature until the expiration date. The other options either involve improper storage conditions or inherent instability, which would compromise the products' effectiveness before the expiration date. Therefore, D stands out as the only option that meets the criteria of remaining stable as intended.