medExtractR: Extraction of Medication Information from Clinical Text

Function and support for medication and dosing information extraction from free-text clinical notes. Medication entities for the basic medExtractR implementation that can be extracted include drug name, strength, dose amount, dose, frequency, intake time, dose change, and time of last dose. The extended medExtractR_tapering implementation is intended to extract dosing information for more tapering schedules, which are far more complex. The tapering extension allows for the extraction of additional entities including dispense amount, refills, dose schedule, time keyword, transition, and preposition.

Version: 0.3
Depends: R (≥ 2.10)
Imports: stringi, stringr
Suggests: knitr, ggplot2, rmarkdown, markdown
Published: 2021-06-06
Author: Leena Choi ORCID iD [aut, cre], Cole Beck ORCID iD [aut], Hannah Weeks ORCID iD [aut]
Maintainer: Leena Choi <leena.choi at>
License: GPL-2 | GPL-3 [expanded from: GPL (≥ 2)]
NeedsCompilation: no
Materials: README NEWS
CRAN checks: medExtractR results


Reference manual: medExtractR.pdf
Vignettes: 1. medExtractR Vignette for basic medExtractR function
2. medExtractR Vignette for tapering extension of medExtractR function
Package source: medExtractR_0.3.tar.gz
Windows binaries: r-devel:, r-release:, r-oldrel:
macOS binaries: r-release (arm64): medExtractR_0.3.tgz, r-release (x86_64): medExtractR_0.3.tgz, r-oldrel: medExtractR_0.3.tgz
Old sources: medExtractR archive

Reverse dependencies:

Reverse suggests: EHR


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