For category 2 drugs, how long can they be kept in a freezer?

• A. 30 days
• B. 60 days
• C. 45 days
• D. 90 days

Answer: (C)

Understanding how long a drug can stay in a freezer is about its stability in frozen storage. In the framework used here, Category 2 drugs are approved for 45 days of freezer storage. This duration reflects a middle ground: long enough to use the medication across multiple doses, but not so long that potency or sterility risk increases significantly.

So, 45 days is the best fit because it matches the designated shelf life for Category 2 in this scheme, balancing practicality with quality. The other times correspond to different categories or are outside the Category 2 window (shorter times fit a less-stable category, longer times fit a more-stable category), so they aren’t the correct choice for Category 2.