| Abbreviation | Definition |
|---|---|
| PPR | Per Patient Request |
| PPS | Postal Prescription Services |
| PR | pegylated interferon and/with weight-based ribavirin |
| PR | per rectum [Lat.] by rectal route |
| PRAC | Pharmacovigilance Risk Assessement Committee |
| PRN | Pro Re Nata - as needed |
| PRN | Pro Re Nata (when required) |
| PRZ | Prescription Root Zone |
| PSTAC | Pharmacist Services Technical Advisory Coalition |
| PT | physiotherapy |
| PTEN | phosphatqase and tensin homologue |
| PULV | Pulvis |
| pulv. | pulvis - powder |
| PUVA | psoralen and ultraviolet A |
| PV | Per Vaginam (via the vagina) |
| q | quaque - every |
| Q.1H | Quaque 1 Hora (every 1 hour) |
| Q.4.H. | Every Four Hours |
| q.a.d. | quoque alternis die - every other day |
| q.a.m. | quaque die ante meridiem - every day before noon |