Answer:

U

S

P

We have spotted USP (3 Letters) a total of 31 times in our database. Below you may see the clues associated with USP and also when and where was it last seen:

Referring crossword puzzle clues

• FDA-approved pharma book: Abbr.
• Pill bottle letters
• Abbr. on a pill bottle

Usage among publishers:

• Universal: Feb 10, 2023
• Universal: Sep 27, 2022
• LA Times: Apr 21, 2022