| Abbreviation | Definition |
|---|---|
| DDU | Drug Discovery Unit |
| DDW | Drug Discovery World |
| DEA | Drug Enforcement Agency |
| DEA | Drugs Enforcement Investigation |
| DEC | Drug Enforcement Commission |
| DECP | Drug Evaluation and Classification Program |
| DEET | Drug Eradication Enforcement Team |
| DENR | Drug Establishments National Registry |
| DEP | dependent |
| DERP | Drug Effectiveness |
| DESP | Diethylstilbestrol diphosphate |
| DESS | Drug Effect Sum Score |
| DFAC | Drug Free Athletes Coalition |
| DFAF | Drug Free America Foundation |
| DFCA | Drug Free Clubs of America |
| DFCC | Drug Free Community Coalitions |
| DFDA | Directorate of Food and Drugs Administration |
| DFNC | Drug Free Noble County |
| DFS | Drug Free Surfer |
| DFSP | Drug Free Safety Program |