Registry tools · FDA label data
Check the record behind a named medication pair.
Start with the FDA label record, then read the documented severity and wording in context. The tool reports what the source file contains; it does not make a personal treatment decision.
Data updated 2026-05-15
- 3,919
- Labeled pairs tracked
- 682
- Medications covered
- 268
- Major-severity pairs
- 35
- Active shortages
PlainMeds reviewed these tools against our methodology in August 2026. They help readers inspect public FDA and CMS records, not make a medication decision.
PlainMeds searches 3,919 FDA-labeled interaction pairs across 682 medications. 268 pairs are marked major in the source data.
Use the interaction checker to retrieve a documented pair and its FDA-label severity. A record is a source lookup, not a personal risk estimate; a missing record does not prove that no interaction exists. Educational information only, not medical advice.
The coverage snapshot
268 of 3,919 labeled interaction pairs (7%) are marked major. The checker makes that source classification visible for a named pair; it does not rank medications or predict an outcome.
- 3,919
- labeled pairs searched
- 268
- major-severity pairs
- 711
- moderate-severity pairs
- 682
- medications in the catalogue
Source: FDA Structured Product Labeling. Severity is the source-file classification, not a per-person probability.
Start a source lookup
Choose two medications, then inspect the documented label record.
Each tool keeps the question narrow: the interaction checker matches a named pair against the available FDA label data and returns the recorded severity and text when present; the comparison tool lines up two medications' FDA and CMS record fields side by side.
- FDA label-pair lookup Interaction Checker Search the documented interaction record for two named medications, with its source-file severity and wording. 3,919 labeled pairs · 682 medications Open the interaction checker
- Side-by-side FDA/CMS lookup Compare Drugs Select two medications to view FDA labels, FAERS adverse-event reports, recalls, shortages, and Medicare pricing side by side. 682 medications available to compare Open the comparison tool
Source-file mix
How the label-pair database is classified
The bars describe the database, not the likelihood that a particular person will experience an effect.
Read a result precisely
A lookup has useful boundaries.
- A documented pair
- Returns the label-derived severity and wording available for that pair.
- No listed pair
- Means no matching record was found in this dataset. It is not proof that no interaction exists.
- A severity label
- Describes the source-file classification. It is not a prediction for an individual person.