Package index • rxref

Resolve and inspect RxNorm concepts

Find RxNorm concepts from drug names or identifiers and retrieve basic concept-level metadata.

resolve(): Resolve free text, RxCUI, or NDC to RxCUI and preferred name
search_drug(): Search free-text drug name and return product CUIs and/or NDCs
get_properties(): Get core RxNorm properties for one or more RxCUIs

Build product-level medication lists

Start from ingredient names or RxCUIs, then expand to clinical or branded drug products suitable for cohort construction, exposure definitions, or medication-list development.

find_ingredients(): Resolve a free-text drug name to ingredient CUIs (IN/PIN)
ingredients_for_rxcui(): Get ingredient concepts for RxCUIs
products_for_ingredients(): Expand ingredient CUIs to product CUIs that truly contain the ingredient

Map between RxCUIs and NDCs

Convert between RxNorm concept identifiers and National Drug Codes, including active and historical NDC associations.

map_to(): Map between NDCs and RxCUIs
map_ndc_to_rxcui(): Map NDCs to RxCUIs
map_rxcui_to_ndc(): Map RxCUIs to NDCs
ndc_status(): Get RxNav status for NDCs

Drug classes and therapeutic categories

Retrieve drug class assertions from RxClass and convenience wrappers for common class vocabularies such as ATC, EPC, MED-RT, and VA classes.

get_drug_classes() experimental: Get class-like RxClass assertions for RxNorm drugs
get_classes() experimental: Get RxClass assertions for RxNorm drugs
find_classes(): Find RxClass drug classes by class name
get_class_members(): Get RxNorm members of an RxClass class
get_atc(): Get ATC classes for RxNorm drugs
get_atcprod(): Get ATC product-level classes for RxNorm drugs
get_epc(): Get FDA/SPL established pharmacologic classes
get_va(): Get VA drug classes for RxNorm drugs

Specialized RxClass relationships

Retrieve selected RxClass relationship types such as mechanisms of action, physiologic effects, indications, contraindications, and chemical structure.

get_medrt(): Get MED-RT assertions for RxNorm drugs
get_medrt_moa(): Get MED-RT mechanism-of-action assertions
get_medrt_pe(): Get MED-RT physiologic-effect assertions
get_may_treat(): Get indication/treatment assertions from MED-RT
get_contraindications(): Get contraindication assertions from MED-RT
get_chemical_structure(): Get chemical-structure assertions

Clinical attribute utilities

Derive clinically useful product attributes, including ingredients, strength, dose form, route, and route-specific product filtering.

get_clinical_attributes(): Clinical attributes from the concept (SCD/SBD) or related SCD/SBD

Product filtering

Fine-tuned filtering of product RxCUI lists.

filter_products_by_route(): Filter RxNorm product concepts by route of administration.
exclude_products_with_ingredients(): Exclude products containing specified ingredients

Concept type helpers

Helpers for working with RxNorm term types, including default and extended product-level term type sets.

tty_catalogue(): Catalogue of RxNorm TTY (Term Types)
product_ttys(): RxNorm product term type sets
default_product_ttys(): Default RxNorm product term types
extended_product_ttys(): Extended RxNorm product term types
extended_ttys(): Extended RxNorm term types

RxClass metadata

Inspect available RxClass relationship sources, relationship names, and source-relationship combinations.

rxclass_rela_sources(): Get RxClass relationship sources
rxclass_relas(): Get RxClass relationship types
rxclass_relationships(): Summarize RxClass relationship types for drugs

Package configuration

Configure rxref behavior, including API settings and memoised API-response caching.

rxref_conf(): Configure rxref
rxref_cache() rxref_cache_info() rxref_cache_clear() rxref_cache_use_memory() rxref_cache_use_disk() rxref_cache_disable(): Manage the rxref cache