| Abbreviation | Definition |
|---|---|
| IDRS | International Drug Research Society |
| IDSC | Investigational Drug Steering Committee |
| IDTC | Instant Drug Test Cup |
| IDTS | Integrated Drug Treatment Service |
| IDTS | Integrated drug treatment services |
| IDTS | Integrated Drug Treatment System |
| IDTS | Inventory of Drug Taking Situations |
| IDU | injecting drug use |
| IDU | Injecting Drug User |
| IDU | Injection Drug User |
| IDU | injection drug users |
| IMID | Immunomodulatory Drug |
| INFb | Interferon Beta |
| INSTI | INtegrase Strand Transfer Inhibitors |
| INSTIS | Integrase Inhibitors |
| IPED | Image And Performance Enhancing Drugs |
| ISDN | Isosorbide dinitrate |
| IVDU | Inner Voice of Drug Users |
| JADAC | Jefferson Alc Drug Abuse Ctr |
| JADAC | Jefferson Alcohol and Drug Abuse Center |