Question 1

many people have self reported to test positive for a urine drug test (like cocaine & meth) after having sex with their partner because drugs can transfer through semen and sweat. would thc also create positive test results even if they dont smoke?

Accepted Answer

Second hand smoke: Second hand smoke from weed is more likely to cause you to have a positive urine test for THC than any transmission through semen. I doubt the explanation of people blaming semen for positive drug test.
Have a healthy diet, exercise 30 minutes/day, drink plenty of water daily so your urine is mostly colorless, have safe sex, no tobacco alcohol weed or street drugs. 
Get HPV vaccine.

Question 2

if a man is using drugs such as cocaine and or pot, and he has intercourse withg a women unprotected can that women fail a drug fail a drug test

Accepted Answer

No but...: ...It does make it more likely that the man will die during sex.  Cocaine is a potent vasoconstrictor which means it cuts off blood supply.  This man should consider getting professional help asap (counseling, meetings, possibly an antidepressant like welbutrin) so that he and the woman can enjoy a healthy sex life for years to come.

Question 3

can i fail a lab drug test just by touching cocaine ?

Accepted Answer

Worth considering: 
We conclude that dermal absorption of cocaine represents a minor, but significant route of exposure to this drug that needs to be considered when interpreting low-level urine drug testing results.

J Anal Toxicol. 1990 Nov-Dec;14(6):383-4.

Question 4

i had sex with girlfriend over the weekend and unbeknownst to her i had used cocaine earlier. i just found out she has a drug test for a new job tomorrow, it will have been over 30 hours since we had sex when she takes the test.could she fail?

Accepted Answer

: Little or no chance. If any risk at all, it might come from kissing, but no risk from intercourse.

Question 5

can i fail a swab drug test from semen?

Accepted Answer

No you cannot: No. Semen will have no effect on that test at all.

Question 6

husband is on prescription hydrocodone. i took a urine drug test and noticed semen in the collection cup due or recent intercourse. could i fail?

Accepted Answer

No: The amount that could possibly be present in your husband's tissue is extremely small, and would not show up with the set-points (usually 2000 ng/ml) for opiates.

Question 7

why did my drug test show positive for cocaine?

Accepted Answer

Few possibilities: There are 3 possible explanations: clerical error (you got the wrong test results), false positive (something legitimate fooled the test), and true positive (you really had Cocaine in your system). There are not many false positives for the Cocaine test, although liver or kidney disease, diabetes, and the antibiotic Amoxicillin reportedly can do it.

Question 8

could lidocaine show in your drug test as cocaine?

Accepted Answer

No: Lidocaine and Cocaine are different drugs, even though they share the "-caine" part in their names.  Lidocaine does not cause a false positive for Cocaine on a drug test.

Question 9

how long does cocaine stay in your urine and turn drug test positive?

Accepted Answer

1-4 days: Most sources list the time for positive Cocaine in the urine from urine drug screen to be 1 to 4 days, with an average time of 3 days. Confirmatory testing for Cocaine rarely reveals a false positive screening.

Question 10

i used cocaine 2 weeks ago. will i test positive in a urine drug test?

Accepted Answer

cocaine: Cocaine can show up for upto 1 week and sometimes for unto 2 weeks.

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Doctor answers about:

Can seman make me fail a drug test from cocaine

A member asked:

Many people have self reported to test positive for a urine drug test (like cocaine & meth) after having sex with their partner because drugs can transfer through semen and sweat. would thc also create positive test results even if they dont smoke?

A member asked:

If a man is using drugs such as cocaine and or pot, and he has intercourse withg a women unprotected can that women fail a drug fail a drug test

A member asked:

Can i fail a lab drug test just by touching cocaine ?

A member asked:

I had sex with girlfriend over the weekend and unbeknownst to her i had used cocaine earlier. i just found out she has a drug test for a new job tomorrow, it will have been over 30 hours since we had sex when she takes the test.could she fail?

A member asked:

Can i fail a swab drug test from semen?

A member asked:

Husband is on prescription hydrocodone. i took a urine drug test and noticed semen in the collection cup due or recent intercourse. could i fail?

A member asked:

Why did my drug test show positive for cocaine?

A member asked:

Could lidocaine show in your drug test as cocaine?

A member asked:

How long does cocaine stay in your urine and turn drug test positive?

A member asked:

I used cocaine 2 weeks ago. will i test positive in a urine drug test?

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