To cite package ‘mmequiv’ in publications use:

  Taylor K (2025). _mmequiv: Calculate Standardized Morphine Milligram
  Equivalent Doses_. R package version 1.0.0.9000,
  <https://github.com/kennethataylor/mmequiv>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {mmequiv: Calculate Standardized Morphine Milligram Equivalent Doses},
    author = {Kenneth A. Taylor},
    year = {2025},
    note = {R package version 1.0.0.9000},
    url = {https://github.com/kennethataylor/mmequiv},
  }