Question 1

i need allergys meds need a negative  drug test  my  allergies  are  killing  me can  i take  benadryl (diphenhydramine)  or  zrtek ?

Accepted Answer

Antihistamine: benadryl (diphenhydramine) use is DANGEROUS if you intend to drive.
Zyrtec, Loratidine etc are safer choices. Best if taken at night time so that you awake without allergy symptoms

Question 2

i took one tylonal pm the has 25mg of benadryl (diphenhydramine) in it. i have a pre employment drug test in 12 hrs whats the chance of a false positive for pcp.

Accepted Answer

Not from either: Neither of these components is going to cause a positive PCP test.

Question 3

can diphenhydramine hcl show up in an at home drug test?

Accepted Answer

No: It shouldn't show up in a home screening test.

Question 4

is there a home drug test to test for diphenhydramine o.t.c. abuse?  i suspect my husband is abusing it

Accepted Answer

Very doubtful: There's info here: https://en.wikipedia.org/wiki/Diphenhydramine
But, I'm concerned too about your relationship. Suspicion is often as harmful as the behavior in question. Consider Couple's Therapy after a few prep sessions for you alone to learn how to communicate concern w/o blame. A test would do nothing to help resolve any problem. Best wishes 2U2.

Question 5

i took two 50mg tablets of diphenhydramine 17 hours before i had to take a pre-employment oral drug test. is there a chance i might fail the drug test?

Accepted Answer

Unlikely: This would not be screened or confused with illegal drugs. However people often get drowsy from this relatively high dose . If you were to fail the test, it would be based on your performance and not the drug itself.

Question 6

i took drug test today and it was positive for tca, i regularly take an otc sleep aid with diphenhydramine. couldn't have caused the false positive?

Accepted Answer

"tca"????: did you mean THC (marijuana or cannabis)?  TCA medically usually means tricyclic antidepressant, and these are actually chemically similar to benadryl (diphenhydramine).  If all that was done was a SCREENING test, there are lots of potential false positives, and if used for legal purposes, all screening tests should be confirmed with a more sophisticated test, usually gas chromatography/mass spectroscopy.

Question 7

i took a urine drug testing for pre employment. about 12 hrs before i took two 50 mg of diphenhydramine sleep aid. is this possible to show up false positive?

Accepted Answer

Yes: Diphenhydramine can cause false positive for opiates and others, results will not confirm on GC/MS.

Question 8

can taking a benedryl affect a drug test?

Accepted Answer

It depends,,: It depends on what you're being tested for and how much benedryl you took.  Apparently it may cause a false positive result for Methadone in some urine drug screens using competitive binding immunoassays, and if too much is taken, it can cause blurry vision, photophobia, heart failure, and death, but a lot has to be taken.  Otherwise, there should not be much of a problem.  Good luck.

Question 9

i took a drug test yesterday, and even though i don't use illegal drugs, i am fretting. i took one benedryl the night before. is that ok?

Accepted Answer

Yes: Benadryl (diphenhydramine) will not show up as a drug of abuse. You know who you are. Try to relax.

Question 10

will benedryl effect the results of a drug test ?

Accepted Answer

It will not...: Attempting to foil a drug screen will just add misery for you--your employer or whoever is requesting the drug screen will see you not just a dope but also a liar (trying to hide/sabotage your drug test). So, it is better to come clean. If you have a problem, ask for help and you will get more respect that way. Be good. Be sober. Be drug-free. Be respected. Good luck.

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Doctor answers about:

Will benadryl affect a drug test

A member asked:

I need allergys meds need a negative drug test my allergies are killing me can i take benadryl (diphenhydramine) or zrtek ?

A member asked:

I took one tylonal pm the has 25mg of benadryl (diphenhydramine) in it. i have a pre employment drug test in 12 hrs whats the chance of a false positive for pcp.

A member asked:

Can diphenhydramine hcl show up in an at home drug test?

A member asked:

Is there a home drug test to test for diphenhydramine o.t.c. abuse? i suspect my husband is abusing it

A member asked:

I took two 50mg tablets of diphenhydramine 17 hours before i had to take a pre-employment oral drug test. is there a chance i might fail the drug test?

A member asked:

I took drug test today and it was positive for tca, i regularly take an otc sleep aid with diphenhydramine. couldn't have caused the false positive?

A member asked:

I took a urine drug testing for pre employment. about 12 hrs before i took two 50 mg of diphenhydramine sleep aid. is this possible to show up false positive?

A member asked:

Can taking a benedryl affect a drug test?

A member asked:

I took a drug test yesterday, and even though i don't use illegal drugs, i am fretting. i took one benedryl the night before. is that ok?

A member asked:

Will benedryl effect the results of a drug test ?

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