## MedicationCheckoutItemResult.duplicate property

True when the line was **not** added because the same drug was already in the vendor's cart (the vendor-recommended duplicate check matched). Reported as `status: 'queued'` with this flag set so the caller can surface it.

**Signature:**

```typescript
readonly duplicate?: boolean;
```

- [MedicationCheckoutItemResult.duplicate property](/content/docs/sdk/core.medicationcheckoutitemresult.duplicate#medicationcheckoutitemresultduplicate-property/index.html)