> ## Documentation Index
> Fetch the complete documentation index at: https://docs.medera.info/llms.txt
> Use this file to discover all available pages before exploring further.

# Drug Interaction Agent

> Behavioral-health-aware interaction and contraindication checks.

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<Info>
  **Category:** Evidence & Safety  ·  **Signals:** Active med list · Prescribing context · Patient comorbidities · Allergies
</Info>

Catch interactions that matter in psychopharmacology and primary care overlap.

## Configuration

| Field                | Description                                   |
| :------------------- | :-------------------------------------------- |
| `library`            | Drug interaction library (DrugBank, RxNorm)   |
| `severity_threshold` | Severity threshold for surfacing              |
| `specialty_context`  | Specialty context (psychopharm, primary care) |
| `policy`             | Allergy + contraindication policy             |

## Execution

1. Reads the active med list and pending order
2. Runs interaction and contraindication checks
3. Surfaces severity-graded warnings with rationale
4. Logs the check and the prescribing decision
5. Tracks warning override patterns

## Composable experts

| Expert                             | Role                                |
| :--------------------------------- | :---------------------------------- |
| **DrugBank Expert**                | Interaction library queries         |
| **Psychopharm Interaction Expert** | BH-specific interaction logic       |
| **Contraindication Expert**        | Patient comorbidity + allergy logic |
| **Severity Grading Expert**        | Clinical severity scoring           |

## Compliance guarantees

<Warning>
  * Interaction library is current and configurable

  * Severity grading is explicit

  * Overrides are logged with rationale
</Warning>

## Endpoints

Canvas: `rails/pharmacy`.

Care Orchestrator event: `PRESCRIPTION_INTERACTION_WARNING`.

***

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