Morphine Milligram Equivalents Calculation

This is a javascript implementation of the morphine milligram equivalent calculation. It allows one to easily convert opioid products to morphine equivalents.

References

• MedCalc example
• CDC guidelines

About

This repo uses typescript for its codebase and jest for testing. Webpack is used to bundle the calculation method to a single distribution file. Along with this tsc is used to create a lib-esm dir to allow for esm consumable modules. Jest tests include individual opioid conversions and conversion of an array of products. Test also include the base examples in the CDC guidelines.

Usage

Import the calculation

Node

var { calculateMME } = require('morphine-milligram-equiv')

ESM

import { calculateMME } from 'morphine-milligram-equiv'

This calculation take an array of products and returns morphine milligram equivalents for each product plus a total for all products. A product consists of a js object with a product name, dose (single dosage taken by patient), frequency (how many times a day a dose is taken).

Example:

var products = [
    {
      name: 'hydrocodone',
      dose: 5,
      frequency: 4,
    },
    {
      name: 'oxycodone',
      dose: 10,
      frequency: 2,
    }
]

calculateMME(products)

Returns

{
    products: [{name: 'hydrocodone', total: 20}, {name: 'oxycodone', total: 30}],
    total: 50
}

Products with conversion factors are listed in the guidelines, but only include

  codeine
  fentanylTransdermal
  hydrocodone
  hydromorphone
  methadone
  morphine
  oxycodone
  oxymorphone
  tapentadol

Tests

Execute yarn test to run all test cases using jest

Build

Execute yarn build to generate dist and lib-esm directories for consuming in node or a browser setting