Stop Guessing Your Meds: Building a Multi-Step Drug Interaction Agent with LangGraph and DrugBank

When it comes to healthcare, "hallucination" isn't just a quirky AI bug—it's a critical safety risk. Building a system that flags Drug-Drug Interactions (DDI) requires more than a simple LLM prompt; it requires rigorous logic, structured data validation, and multi-step reasoning. In this tutorial, we are going to build a sophisticated Medical Safety Agent using LangGraph , DrugBank API , and Pydantic . This agent won't just guess; it will perform structured lookups, cross-reference allergy histo