Can Nyquil or Benadryl cause a false positive for methadone?
Question posted by Mmc1983 on 25 May 2011
Last updated on 25 May 2011 by suzanne66
Yes, the dextromethorphan in Nyquil and the diphenhydramine in Benadryl could both give false positives for Methadone
The following lists some of the common medicine/conditions that can cause a false positive for opiates:
You will see that Nyquil can cause a false positive for opiates as well as amphetamines.
Hope this helps,
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