Question 25

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

An unreconstituted bottle of clarithromycin is designed to maintain its stability and potency until the expiration date indicated by the manufacturer when stored properly at room temperature.

A) An unreconstituted bottle of clarithromycin stored at room temperature

This option is correct because unreconstituted clarithromycin is stable and effective until the expiration date if kept at room temperature, as per the manufacturer's guidelines. The stability of this medication in its original form allows it to retain its therapeutic properties until the indicated date.

B) A vial of Humalog stored in the freezer

This option is incorrect because Humalog, an insulin product, should not be stored in the freezer. Freezing can cause the insulin to become ineffective, reducing its potency and making it unsafe for use.

C) A vial of Varivax stored under refrigeration

While Varivax is a vaccine that requires refrigeration, it must be used within a specific timeframe after reconstitution. If stored improperly or beyond the recommended duration, its efficacy may be compromised, thus not ensuring stability until the expiration date.

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

This option is incorrect as moisture exposure can lead to degradation of doxazosin, potentially affecting its stability and efficacy. An open bottle, especially if compromised by environmental factors, cannot be expected to remain stable until the expiration date.

Conclusion

The correct answer, an unreconstituted bottle of clarithromycin stored at room temperature, is stable until the expiration date as indicated by the manufacturer. In contrast, the other options either involve improper storage conditions or have been compromised, which would affect their stability and effectiveness.