The Most Comprehensive
Drug Interaction Checker
Built from over a quarter million FDA drug labels and NIH data. Severity-ranked results. Instant autocomplete. Scan pill bottles with your camera.
Enter up to 20 medications to check for interactions.
For informational purposes only. Not a substitute for professional medical advice. Always consult your doctor or pharmacist.
How It Works
Type or scan your medications
Autocomplete resolves each drug to its exact FDA identity. Or tap the camera icon to scan a pill bottle label directly.
Add up to 20 drugs at once
CDI computes every possible pair combination simultaneously — unlike most checkers that handle only two drugs.
See severity-ranked results
Contraindicated interactions surface first. Every result links back to the actual FDA label — not a third-party summary.
Why CDI is Different
Every approved U.S. drug label parsed for interaction warnings.
Unique drug-pair interactions with severity classifications.
Every possible pair combination — so nothing slips through.
Sourced directly from U.S. government APIs — not summaries.