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Doctor insights on: Will Benadryl Affect A Drug Test

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Dr. Alan Wartenberg
572 doctors shared insights

Drug Testing (Definition)

It is the process of examining body fluids or tissue for evidence of chemicals taken or not taken. It does not diagnose addiction however this a ...Read more


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

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. ...Read more

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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?

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?

"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. ...Read more

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Can taking a benedryl affect a drug test?

Can taking a benedryl affect a drug test?

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. ...Read more

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Will benedryl effect the results of a drug test ?

Will benedryl effect the results of a drug test ?

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. ...Read more

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Does mixing two types of urine affect a drug test? My son haven't smoked in 3 months but he wasnt sure so he used his friends urine...When he put the urine in the test cup it wasnt enough..So he used some of his own....If he is clean and no marijuana come

Does mixing two types of urine affect a drug test? My son haven't smoked in 3 months but he wasnt sure so he used his friends urine...When he put the urine in the test cup it wasnt enough..So he used some of his own....If he is clean and no marijuana come

Your son has a: Bigger problem, and if you are aware of this and not talking to him about personal honesty and dishonesty, and the difference, you are enabling him in making bad choices. Depending on what the urine test is for, if he is found out (there are a number of tests done on urine that can detect adulteration or someone elses pee) there can be serious legal consequences beyond not getting a job. ...Read more

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Will Vyvanse (lisdexamfetamine) 30mg affect a drug test after one dose?

Yes, depending on : When testing is done relative to when it was taken. However, "drug screens" are read as positive by the concentration of a drug or its metabolite in the urine sample; therefore, depending on timing, the concentration may fall below the cut-off point for a "positive" screen. It isn't a problem for anyone who can show a prescription bottle in his or her name. Diversion is a different story. ...Read more

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Would rum raisin ice cream affect a drug test?

Would rum raisin ice cream affect a drug test?

Not likely: Raisins contain tyramine, an amino acid derivative. Large amounts of tyramine can cause an increase in pulse and blood pressure. Rum raisin ice cream does not have enough rum or raisin to cause any significant side effects or interfere with drug tests. ...Read more

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Will pseudoephedrine hydrochloride affect a drug test?

Will pseudoephedrine hydrochloride affect a drug test?

Possibly: "false positive testing" occurs when a test finds evidence of illegal drug use when no drugs were taken. This can be a result of some over-the counter medications having chemical structures similar to illegal drugs. Pseudofed, found in many allergy and "cold" medications is one of these drugs. ...Read more

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Will pseudoephedrine hydrochloride affect a drug test ?

Be prepared...: Based on the sophistication of the test, or lack of it, quite possibly. ...Read more

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I'm in Lamictol for seizures. Would this affect a drug test? & I have smoke pot for several yrs (small amnts) havent smoked in 2 weeks, would it show?

Cannabis: would show up on a screen for drugs of abuse but not on most standard tests. Single use of marijuana should be out of your urine in 1 to 7 days. Regular use of marijuana – should be out of urine in 7 to 100 days. Single use marijuana can be detected 12 to 24 hours in blood. Regular use marijuana can be detected for 2 to 7 days in blood. Marijuana regular use detected in hair for months. Single _ ...Read more

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Does amoxicillin and clavulanate affect a drug test for thc?

It should not: Even if one of these produces an interference by one method, thc assays must be confirmed by another test using a different chemical principle if they are to have any consequences to the person. This isn't the place to talk about the wisdom of the marijuana laws or testing which may have adverse consequences. Good luck and i hope things work out for you. ...Read more

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Today is may 11th. My friend smoked a little marijuana on apr 19. Didn't smoke ever before that. Drug test is on may 13th. Will he pass?

Today is may 11th.  My friend smoked a little marijuana on apr 19.  Didn't smoke ever before that.  Drug test is on may 13th.  Will he pass?

Time and amount: A single dose of marijuana is detected for 1-7 days in urine, marijuana detection time based on usage usage at 1 time only 5-8 days usage at 2-4 times per month 11-18 days usage at 2-4 times per week 23-35 days usage at 5-6 times per week 33-48 days daily usage 49-63 days. ...Read more

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Dr. John Chiu
1,040 doctors shared insights

Diphenhydramine (Definition)

Diphenhydramine is a sedating antihistamine which is a kind of antihistamine type drug (common ...Read more


Benadryl (Definition)

Diphenhydramine is a sedating antihistamine which is a kind of antihistamine type drug (common ...Read more