| Abbreviation | Definition |
|---|---|
| LSDU | Longitudinal Study of Drug Use |
| LTG | Lamotrigine |
| MABP | Mean Ambulatory Blood Pressure |
| MAD | Mind Altering Drink |
| MADAP | Maryland AIDS Drug Assistance Program |
| MADC | Mayor's Anti Drug Coalition |
| MADC | Meridian Anti Drug Coalition |
| MADCP | Michigan Association of Drug Court Professionals |
| MADCP | Mississippi Association of Drug Court Professionals |
| MADS | Metropolitan Area Drug Study |
| MAH | Market Authorization Holder |
| MCDC | Madison County Drug Court |
| MDAT | Mandatory Drug and Alcohol Testing |
| MDDB | Master Drug Data Base |
| MDDD | Marine Drug Discovery Database |
| MDDD | Multi Dose Drug Dispensing |
| MDDR | MDL Drug Data Report |
| MDDR | Molecular Detection of Drug Resistance |
| MDI | Multiple Daily Injections |
| MDI | Multiple Drug Intake |