Ask Erowid

Ask a Question


Find an answer:

View By Category

Search Ask Erowid
Search Vaults


Enter a keyword in the search field above to look up a question or answer on a specific topic.

Off-Site Psychoactive Question Resources
  Ask Dr Shulgin

Resources at Erowid
  Plants & Drugs
  Freedom & Law
  Mind & Spirit
  Arts & Sciences
  Library / Bookstore
  What's New
  About Erowid
  .
Q: Do painkillers show up on drug tests?

A: Many over-the-counter and prescription drugs can cause positive results on a drug test. Whether or not any particular painkiller will result in a positive test depends entirely on what the active ingredients in the painkiller are.



Many prescription pain killers contain opiates. Many opiates are detected in the standard drug tests, so morphine or codeine, for example, would likely result in a positive opiates test. Other opiate pain killers are not detected with the standard opiate tests. Oxycodone, for instance, is detected with a standard opiate drug screen (used as the first pass test on urine), but will not be detected by the confirmation tests done by GC/MS. This is because the GC/MS test for opiates looks for morphine and codeine which many opiates break down into. Oxycodone does not break down into morphine or codeine and so is not detected. Doing a web search on the active ingredients listed on the pain killer packaging should turn up specific info about whether or not it is an opiate.



Other pain killers contain acetaminophen. While acetaminophen is not illegal, nor tested for in drug tests, heavy levels can cause a false positive for cannabis. This is relatively unlikely.



There is more information about such interactions in our Drug Testing Vaults.

Asked By : 123weed
Answered By : Sophie
Published Date : 7 / 23 / 2001
Last Edited Date : 10 / 15 / 2002
Question ID : 2770

Categories: [ Drug Testing ] [ Pharmaceuticals ]



Ask Erowid v1.7 - Jul, 2005

(content and html © the Vaults of Erowid. Please ask permission before publicly reproducing.)