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The Global Emergency Medicine Wiki
8,842 pages with 60,045 recent edits


WikEM, The Global Emergency Medicine Wiki, is the world's largest emergency medicine open-access reference resource. Our highly acclaimed content is freely available via the internet and our dedicated mobile applications. If you are a medical practitioner, join our contributor community and share your important knowledge with the world.

WikEM is a project of the OpenEM Foundation, a 501(c)(3) nonprofit public charity. Please donate to help make open access to medical knowledge possible!


UTox and cross reactivity

Many non illicit drugs cross react with common drugs screened on the traditional urine drug screen.

  • NSAIDs can cause false positive cannabinoid screens
  • Sertraline can cause a benzo false positive
  • Most benzodiazepine screens look for oxazepam which is a metabolite of diazepam and chlordiazepoxide. Therefore, lorazepam, alprazolam, and clonazepam are commonly missed.

What is the detection interval for marijuana on a UDS?Read more

WikEM resident usage study published in JAMIA

A 6 year study on the usage of WikEM by emergency medicine graduates and current residents has been published in JAMIA.… Read more

Warfarin reversal guide

A quick pearl on the INR stratified guidelines for warfarin reversal.… Read more