| 1. Drawing up the wrong medication for the wrong patient or for an unapproved indication |
| 2. Wrong dose or dosing interval |
| 3. Wrong body part or route of administration (IV versus IM or subcutaneous) |
| 4. Reuse of a syringe, intravenous solution bag, medication vial, or needle on multiple patients |
| 5. Sharing of injection equipment by multiple patients, e.g., of insulin pen injectors or of illicit drugs |
| 6. Contamination of medication vials before or during use (risk of bacterial, fungal, or viral contamination) |
| 7. Nonsterile technique during injection |
| 8. Mishand ling of medications, e.g., inadequate refrigeration or dilution |