I took a 2 naproxen 500 at about 5am then took a urine screen at about 1130am n it show maurijuana and cocaine n my urine which is not possible because I never used those drugs before
20 May 2011
The following is a list of drugs/conditions that can cause a false positive for marijuana (THC) and cocaine:
THC - Substances or Conditions which can cause false positives
Ibuprofen; (Advil, Nuprin, Motrin, Excedrin IB etc)
Ketoprofen (Orudis KT)
Kidney infection (Kidney disease, diabetes) Liver Disease
Promethazine (Phenergan, Promethegan)
Riboflavin (B2, Hempseed Oil)
Cocaine - Substances or Conditions which can cause false positives
Kidney infection (kidney disease)
Liver infection (liver disease)
Amoxicillin, tonic water
As you can see the naproxen is listed for causing a false positive for THC, but not sure why you had a positive for cocaine.
I found this by googling false positive on drug test if you want to do some more reading.
20 Jul 2013
the only way it shows up as a false positive is if u bought one of them over the counter home drug test cause they are never accurate. my wife works 4 quest diagnostic & that is one of the most asked questions so if ur test is done at a lab ur absolutely fine I actually take the naproxen cause the ibuprofrin 800's mess my stomach up. but ur fine bro trust me...
- Naproxen Information for Consumers
- Naproxen Information for Healthcare Professionals (includes dosage details)
- Side Effects of Naproxen (detailed)
Search for questions
Still looking for answers? Try searching for what you seek or ask your own question.
I'm currently on a methadone program and a urine test recently showed positive for cocaine, even though I have not used cocaine, only temazepam ...
1 answer • 19 Nov 2009
I believe my 17 year old son might have snorted a very small amount of crack cocaine about 4 or 5 days ago and I want to know if it will show up in a ...
2 answers • 26 Jul 2010
Hello. I am in a heated custody battle for my son in which I am winning. Then after months of hearings my exwife decided to allege that I was a ...
1 answer • 11 Sep 2011
The doctor sent my son for a Urine Drug Screen, he tested negative for Amphetamine, Barbiturate, Benzodiazepines, Cannabinolds, Cocaine, Opiates, ...
3 answers • 27 Jul 2012
2 answers • 12 Jan 2014