| Abbreviation | Definition |
|---|---|
| PHD | Potentially Heavy Drinker |
| PHEL | Physiological Heat Exposure Limit |
| PHENIR | Pheniramine Maleate |
| PHENOBARB | Phenobarbital |
| PHENOLPHT | Phenolphthalein |
| PHENSAL | Phenyl Salicylate |
| PHENYLEPH | Phenylephrine Hydrochloride |
| PHENYLEPHBIT | Phenylephrine Bitartrate |
| PHENYLEPHTAN | Phenylephrine Tannate |
| PHENYLTOL | Phenyltoloxamine Citrate |
| PHF | Parathyroid Hypertensive Factor |
| PHI | Physically Health Impaired |
| PHI | Private Health Information |
| PHID | Prostate Help Information Database |
| PHN | Pioneer Virtual Health Network |
| PHN | Post- Herpetic Neuralgia |
| PHN | Preferred Health Network |
| PHN | Public Health Nurse |
| PHOS | Phosphate |
| PHQ | Patient History Questionnaire |