How to choose a drug interaction checker
Check Drug Interactions (CDI) focuses on making public drug information easier for patients and caregivers to use. Use these questions to compare any tool, including ours.
| What matters | What CDI provides | What to check |
|---|---|---|
| Sources | Primarily FDA labeling through openFDA, RxNorm drug identities, and explicitly tagged curated supplementation. | Does the tool name its evidence sources and distinguish original text from interpretation? |
| Medication lists | Up to 20 medications, all pairs checked, with severity-ranked results. | Can you review your whole list and distinguish a missing record from a documented result? |
| Finding a medication | Autocomplete and camera label scanning. | Can you confirm that the selected name and product match your medicine? |
| Understanding results | Source information and educational explanations, with contraindicated, major, moderate, minor, and unknown severity states. | Does the tool explain its categories and acknowledge uncertainty? |
| Sharing | Shareable medication workflows for conversations with caregivers and clinicians. | Can you bring a clear list and questions to your pharmacist? |
| Access | The interaction checker can be used without an account; saved personal workflows may require one. | Which features need registration or payment? |
Different tools can serve different needs
A source-label interface and a clinically edited reference are different kinds of resources. This page does not rank competitors or claim that CDI has the most complete data. Evaluate each service using its own current documentation and your needs.
What our data can tell you
CDI helps you inspect documented records. It does not establish that an unlisted combination is safe or determine whether a medication is right for you. Source coverage and extraction have limits, and an explanation is not a new medical finding.
See our methodology, editorial policy, and mission. You can also inspect openFDA labeling documentation and RxNorm documentation directly.