The U.S. National Library of Medicine (NLM) produces the Metathesaurus FDA Structured Product Labels (MTHSPL), which is based on the Food and Drug Administration (FDA) Structured Product Labeling (SPL). Information for this source is extracted from the NLM DailyMed Web site.
Concept names with this source abbreviation were created by NLM to provide contextual information for FDA SPL terms.
SPL is a document markup standard approved by Health Level Seven (HL7) and adopted by the FDA as a mechanism for exchanging medication information.
MTHSPL includes drug product and active substance terminology used in Structured Product Labels.
MTHSPL contains approximately 158,821 drug products and 21,070 substances.
Metathesaurus Update Frequency
MTHSPL is updated in each Metathesaurus release as part of RxNorm.
Drug labels and the most recently updated information are available on DailyMed. Health information suppliers can download drug labels in SPL format from DailyMed. Drug labeling on DailyMed is the most recent submitted to the FDA and currently in use.