Day 28: BUILD PROJECT - Drug Interaction Detection System with LightRAG

RAG for Healthcare | Day 28 of 35 | PREMIUM (Paid Subscribers Only)

125,000 Deaths Per Year. This Notebook Addresses Why.

Drug interactions kill more Americans annually than car accidents. And the tragic part: most of these interactions are known. They are documented in FDA labeling, in pharmacology textbooks, in drug databases. The information exists.

The problem is detection at the point of prescribing.

Most EHR alert systems use pair-wise lookup tables:

Drug A + Drug B = alert.

They catch the obvious ones.

But they miss interaction cascades: the multi-drug pile-ups that happen when three or four medications collide through shared metabolic pathways.

Here is a real scenario: A cardiologist prescribes amiodarone for a patient already on warfarin. The EHR fires an alert: amiodarone inhibits CYP2C9, warfarin levels will rise, reduce the dose. Good. The pharmacist adjusts.

But the patient also has a fungal infection, and the ID team adds fluconazole. Fluconazole is also a potent CYP2C9 inhibitor. Now warfarin has two inhibitors blocking its metabolism simultaneously. The additive effect isn’t 30-50% increase: it’s potentially catastrophic. The EHR fires two separate pair-wise alerts (warfarin-amiodarone, warfarin-fluconazole), but it doesn’t flag the additive cascade: that dual CYP2C9 inhibition creates a compounding risk far greater than either interaction alone.