| Abbreviation | Definition |
|---|---|
| PRMB(CDER) | Program and Resources Management Branch (CDER) |
| PRN | Pro Re Nata (As needed) |
| PrP | Prion Protein |
| PRRB | Paperwork Reduction and Records Branch |
| PRRB(OC) | Paperwork Reduction and Records Branch (OC) |
| PRRMS | Paperwork Reduction and Records Management Staff |
| PRRMS(OC) | Paperwork Reduction and Records Management Staff (OC) |
| PRS | Policy Research Staff |
| PRS(OC) | Policy Research Staff (OC) |
| PRSB | Plastic and Reconstructive Surgery Devices Branch |
| PRSB(CDRH) | Plastic and Reconstructive Surgery Devices Branch (CDRH) |
| PS | Particle Size |
| PS | Planning Staff |
| PS(CDER) | Planning Staff (OC) |
| PSA | Prostate Specific Antigen |
| PSA | Prostate-Specific Antigen |
| PSB | Program Surveillance Branch |
| PSB(CBER) | Program Surveillance Branch (CBER) |
| PSC | Post-market Strategies Committee |
| PSC | Program Support Center (DHHS) |