| Abbreviation | Definition |
|---|---|
| MEDEC | Medical Devices Canada |
| MEDLARS | MEDical Literature Analysis and Retrieval System |
| MedPAC | Medicare Payment Advisory Commission |
| MEDSA | Medicine Equity and Drug Safety Act of 2000 |
| MedSuN | Medical Product Safety Network |
| MEDWATCH | FDA Safety Information and Adverse Event Reporting Program |
| MEDWATCH | MEDical WATCH |
| MEFA | Foreningen Af MEdicinfabrikanter |
| MEG | MagnetoEncephaloGraphy |
| MEMO | Medicines Evaluation and Monitoring Organization |
| MERCOSUR | MERcado COmún del SUR (Southern Common Market) |
| MERP | Medication Error Reporting and Prevention |
| MERS-TM | Medical Event Reporting System - Transfusion Medicine |
| MeSH | Medical Subject Heading |
| MESNA | Mercaptoethanesulfonate |
| MFA | Medicated Feed Application number |
| MFC | Model Food Code |
| MFR | ManuFactureR |
| MFRPS | Manufactured Food Regulatory Program Standards |
| MGB | Molecular Genetics Branch |