Final answer:
The BUD for low, medium, and high-risk CSPs stored at freezer temperature is 45 days, 30 days, and 7 days respectively.
Step-by-step explanation:
The BUD (Beyond Use Date) for low, medium, and high-risk CSPs (Compounded Sterile Preparations) stored at freezer temperature depends on the risk level.
For low-risk CSPs stored at freezer temperature, the BUD is typically 45 days.
For medium-risk CSPs stored at freezer temperature, the BUD is usually 30 days.
For high-risk CSPs stored at freezer temperature, the BUD is generally 7 days.