| Abbreviation | Definition |
|---|---|
| HS | Half Strength |
| HSP | Hard to Swallow Pill |
| HTD | highest treatment dose |
| IBP | Ibuprofen |
| IDP | Instant Death Possibility |
| IDU | Illicit drug users |
| IIV | inactivated influenza vaccine |
| IJ,inj | injectio - injection |
| IM | imatinib mesylate |
| IM | IntraMuscular injection |
| IMRT | Intensity-modulated Radiation Therapy |
| IN | intranasal |
| INI | If No Improvement |
| IP | intraperitoneal |
| IPMS | Independent Pharmacy Matching Service |
| IPP | Inhibiteur de la Pompe à Protons |
| IPV | inactivated poliovirus vaccine |
| IRP | International Reference Preparation |
| IVIG | intravenous immune globulin |
| IVIG | Intravenous immunoglobulin |