Interaction & safety checks · Contraindication checker
Drug contraindication checker that flags blockers in context
A contraindication is rarely missed because no one knew it. It is missed because it sat three lines deep in a problem list while attention was on the presenting complaint, and the new drug looked routine.
Prescriber.io is a contraindication checker that brings those blockers into view. As a medication is considered, it checks it against the patient context, flags contraindications and cautions, surfaces the reason in plain language, and suggests safer alternatives where they exist. The licensed clinician reviews each flag, verifies against official sources, and signs. It surfaces the risk; the clinical decision stays with the prescriber.
Press Run check to see the interaction, contraindication, and dosing decision-support card for this scenario.
This on-page demo only ships with five illustrative scenarios and never invents clinical output, so it will not fake a card for this pair.
The full Prescriber.io desk checks any regimen against interactions, contraindications, and renal or hepatic dosing, with cited sources for you to verify.
Interaction
Contraindication / allergy check
Dosing guidance (renal / hepatic)
Guideline-based alternatives
Illustrative sample · not real clinical advice · you verify and decide
Clinician-in-the-loopDecision support for licensed clinicians. Prescriber.io does not diagnose or prescribe and is not a substitute for professional clinical judgment.
Check · flag · suggest · you review and sign off
Decision-support not autonomous prescribing
You review & sign off
In short
A contraindication checker flags when a drug should not be given to a specific patient because of a condition, an allergy, pregnancy, or organ function. Prescriber.io surfaces the contraindication in the same card as the interaction and dose-adjustment checks, in plain language and with the source cited, so nothing is checked on a separate screen and then forgotten. It is decision-support for licensed US clinicians, not autonomous prescribing: you review each flag, verify against official sources, and sign.
Why it works
What your group gets with contraindication checker
Checks against the context
The checker weighs the considered medication against the patient context, so a contraindication buried in the chart is surfaced rather than overlooked.
Plain reason, cited
Each flagged contraindication comes with a short, citable reason, so the prescriber understands the basis and can record it.
Alternatives suggested
Where a contraindication blocks a choice, the assistant suggests guideline-based alternatives for the clinician to consider and verify.
What it handles
Checked, flagged and suggested for your review
The decision-support card checks the prescription for interactions, flags contraindications and allergy blockers, surfaces renal and hepatic dose adjustments, and suggests guideline-based alternatives. You confirm, verify against official sources, and sign off.
- Checks medications against the patient context
- Flags contraindications and cautions
- Explains the reason in plain language
- Suggests safer alternatives to review
- Clinician verifies against sources and signs
Interaction flagged for review
A potential drug interaction is surfaced on the sample prescription for the clinician to review. The card flags it for your judgment and does not prescribe.
Renal dose adjustment suggested for review. Confirm against official sources before prescribing. Decision-support for review and sign-off.
Why Prescriber.io
One integrated check at the point of care
Not separate lookups stitched together. Check interactions, flag contraindications and suggest alternatives in one calm card, with the clinician signing off on every prescription.
Checks interactions and contraindications
A second set of eyes flags drug interactions, contraindications and allergy blockers for review on every prescription, so a missed interaction is less likely to slip past at the end of a long clinic.
Surfaces dosing guidance
Renal and hepatic dose adjustments surface alongside the checks, so a dose that should be adjusted for organ function is raised for you to confirm before you prescribe.
Suggests guideline-based alternatives
When a flag warrants it, the card suggests guideline-based alternatives with a one-line rationale and cited sources. The suggestion saves the lookup, never the judgment.
Good questions
Questions about contraindication checker
Explore more
More ways clinicians prescribe with Prescriber.io
Drug interaction checker
One integrated check for interactions before you sign, not five separate lookups.
Learn moreDrug-drug interaction checker
Check a full medication list for drug-drug interactions at once.
Learn moreMedication interaction checker
Check a regimen for interactions across drugs, in plain language.
Learn moreReference lists: anticholinergic burden drug list, p-glycoprotein (p-gp) inhibitors, and ssri drug interactions.
From the blog: best drug interaction checker in 2026, what is clinical decision support, and how to reduce prescribing errors.
Prescribe with the decision-support card alongside you
Check for drug interactions, flag contraindications, surface renal and hepatic dosing, and suggest guideline-based alternatives. You review, verify against official sources, and sign off on every prescription.
Prescriber.io is a clinical reference and decision-support tool for licensed clinicians. It does not diagnose or prescribe autonomously and is not a substitute for professional clinical judgment. Always verify against official sources.