PlainMeds provides educational information only. This is not medical advice. Always consult your doctor or pharmacist.

Drug Interaction Checker

Select two medications below to check if they have a known interaction. Results include severity, mechanism, and safety recommendations.

Important: This tool is for informational purposes only. Always consult your healthcare provider or pharmacist before starting, stopping, or changing any medication.

Frequently Asked Questions

How does the drug interaction checker work?
Select two medications from the dropdown menus and click "Check Interaction." The tool searches our database of FDA drug label data for known interactions between the two drugs and displays the severity, description, mechanism, and recommendation if an interaction exists.
What do the interaction severity levels mean?
Major interactions may be life-threatening or cause serious side effects and should generally be avoided. Moderate interactions may worsen your condition or change how your medications work — your doctor may need to adjust dosages. Minor interactions are unlikely to cause significant problems but should still be mentioned to your healthcare provider.
What if no interaction is found?
If no interaction is found in our database, it does not guarantee that no interaction exists. Our database covers common prescription medications but may not include every possible drug combination. Always consult your doctor or pharmacist before combining medications.
Can I check more than two drugs at once?
This tool checks interactions between two specific drugs at a time. For checking multiple medications simultaneously, visit our full Interaction Checker at /interactions which supports adding multiple drugs.
Is this tool a substitute for medical advice?
No. This tool is for informational purposes only and should not replace professional medical advice. Always consult your healthcare provider or pharmacist before starting, stopping, or changing any medication.

Medical Disclaimer: This tool is for informational purposes only and does not constitute medical advice, diagnosis, or treatment. Drug interaction data is sourced from FDA drug labels and may not include all possible interactions. Always consult your doctor, pharmacist, or other qualified healthcare provider with any questions about your medications. Do not start, stop, or change any medication without professional medical advice.

Data source: U.S. Food and Drug Administration (FDA) drug labels via openFDA. Database includes 682 medications.