How to Build a Medication Interaction Checker

Design the input, normalization, result, and uncertainty states before adding clinical-looking UI.

Define the product boundary

Define the product boundary is the first design decision for how to build a medication checker. Design the input, normalization, result, and uncertainty states before adding clinical-looking UI. Write the boundary down before choosing endpoints or drawing clinical-looking UI so reviewers can test the actual promise.

Normalize medication inputs

For how to build a medication checker, normalize medication inputs should remain observable rather than becoming hidden adapter behavior. Give resolution, lookup, and interpretation separate states, then decide which failures a user may retry.

Model found and no-record states

Model found and no-record states needs an operational test, not only a happy-path example. Add a bounded timeout, stable error handling, request IDs, privacy-safe logging, and a fixture that proves the how to build a medication checker workflow fails closed.