# ANVISA, CMED and DCB data provenance

Understand Brazilian data sources, evidence classes and IaBula coverage limits before interpreting pharmaceutical records.

Canonical: https://iabula.com/docs/en/provenance

## The role of each source

- ANVISA: open registered-medication data and regulatory facts present in the adopted resource.
- CMED: public presentation data and fields from the adopted pricing resources; V1 does not advertise a pricing endpoint.
- DCB: public active-ingredient numbers and denominations from the adopted list.

IaBula structures adopted resources; it is not an official API of these authorities and does not represent all their systems. Sources publish at different intervals. This documentation does not promise real-time updates, exhaustive coverage or an update SLA.

## Read evidence with each fact

Important records carry evidence. Classes distinguish official, derived and inferred facts where applicable. OFFICIAL requires traceable official evidence; DERIVED describes transformation; INFERRED describes inference. These classes are not clinical accuracy probabilities.

Evidence includes class and may include source, dataset, retrieved_at, source_record_id, source_run_id, attribute and rule_version. Change evidence adds source_version and source_url. Clients should not fill absent fields by assumption.

## Absence, nulls and identity

An empty list describes the catalog, not the entire market. A null field indicates information unavailable in the contract. Active-ingredient text does not imply a canonical link, and similar names do not establish a regulatory relationship. Preserve these distinctions in your product.

- [Ingredients and DCB](https://iabula.com/docs/en/ingredients)
- [Relationships](https://iabula.com/docs/en/relations)
- [ANVISA integration guide](https://iabula.com/docs/en/guides/consultar-medicamento-anvisa-api)

## Resources

- [OpenAPI JSON](https://iabula.com/openapi.json)
- [Swagger](https://iabula.com/docs/swagger)
- [Documentation index](https://iabula.com/llms.txt)