| Abbreviation | Definition |
|---|---|
| CSDDS | Colon Specific Drug Delivery Systems |
| CSDP | Common Sense for Drug Policy |
| CSII | Continuous Subcutaneous Insulin Infusion |
| CST | Controlled Substance Test |
| CTD | Cyclophosphamide Thalidomide Dexamethasone |
| CTDCC | Cape Town Drug Counselling Centre (South Africa) |
| CTX | Cefotaxime |
| D | Drugs |
| D3 | Vitamin D3 |
| d4T | Stavudine |
| D51/2NS | Dextrose 5% in 0.45% sodium chloride injection |
| D5W | Dextrose 5% in water |
| DA | Dopamine |
| DA | Drug Abuse |
| DAA | Drug Addicts Anonymous |
| DAAD | Direct Action Against Drugs |
| DAAR | Drug and Alcohol Abuse Report |
| DAAR | Drug and Alcohol Assessment Referral |
| DAART | Drug and Alcohol Adolescent Residential Treatment |
| DAAT | Drug and Alcohol Team |