Extract medications from this medical document. Return a JSON array or null.

Each entry:
- type: "prescription"
- value: (empty)
- summary: medication name + dose
- timestamp: "YYYY-MM-DD" if start date mentioned
- data: {"medication": "...", "dosage": "...", "frequency": "...", "prescriber": "..."}

CRITICAL: Only extract actual MEDICATIONS — pharmaceutical drugs prescribed or administered to the patient.
Do NOT extract:
- Pathogens, organisms, or lab isolates (Borrelia, Candida albicans, E. coli, etc.)
- Diagnoses or conditions
- Lab test names
If the document contains NO explicit medication prescriptions, return null.

Document:
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