Drug or substance interactions without injury or harm

**Definition:** A drug interaction is a situation in which a substance affects the activity of another drug when both are administered together. Includes increased effectiveness, decreased effectiveness or a new effect that is not produced from either drug on its own. No injury or harm occurred as a result.

**Long definition:** Includes: drug-drug interactions, drug-food interactions, prescription and non-prescription drugs. No injury or harm occurred as a result.

**Exclusions:** - Drug or substance interactions, as mode of injury or harm