Question 1

why do child medications have artificial flavors?

Accepted Answer

Medicine tastes bad: Medicine tastes nasty, really nasty. It has to be sweetened and "dealt with" to make it palatable. I've tasted some of these, and found it difficult not to make a scene in front of the family. Natural flavors are expensive, and may go bad after awhile. Plus, artificial flavors are just more powerful at covering the nasty taste. Unfortunately, it may just be a necessary evil for now.

Question 2

which medications will cause false positive ua results?

Accepted Answer

Which UA: Urine analysis looks at multiple components. Which component, chemical, or cell type are you concerned about?

Question 3

what prescription medication would give a false positive for thc?

Accepted Answer

None: There is no prescription medication that will give a false positive for cannabis.  The prescription medication Marinol is the only prescription medication that would give a positive result for THC on a urine test, and that is not a "false" positive, it contains THC.  Medical marijuana will also give a positive on a urine drug screen, but again, not a "false" positive.

Question 4

what medication effects a methacholine challenge causing false negatives? in detail please?

Accepted Answer

There's a list of...: Things that may lead to a false negative:  inhaled and oral bronchodilators, cromolyn, nedocromil, hydroxyzine, cetirizine, leukotriene modifiers, coffee, tea, cola drinks, and chocolate. Sometimes oral or inhaled corticosteroids are included in the list. Whether or not these things "cause" a negative depends on many factors. The list and more information is from the Cleveland Clinic website.

Question 5

what medications could easily lead to a false positive for amphetamine on a drug test?

Accepted Answer

Depends: Depends on screening tool.  Many screening tests will detect a variety of amphetamine like substances - metabolites of ephedrine, (ephedrine sulfate) Pseudoephedrine or others of the substituted phenethylamine group - a very large group.  If positive on screening tool,  gas chromatography / mass spectrometry will confirm the compound and  its metabolites. There are no false positive gc/ms.

Question 6

how long on average does hydromorphone stay in the system? is it in any other medications, or will another medication lead to a false positive

Accepted Answer

Drug screen: Drug screen can stay positive up to 6 weeks with hydromorphone.

Question 7

what factors can contribute to a false positive pregnancy test?  i'm not on any medication and an curious if my positive result might be incorrect.

Accepted Answer

Probably positive: It's probably positive. The test checks for the Beta subunit of HCG, and it doesn't cross react with other hormones. It sounds like you are pregnant.

Question 8

i have a question: what is the effect of the valtrex medication on the result of the hiv test to be a false negative? is there an effect that had a negative test while taking suppressive valtrex?

Accepted Answer

: There are no medications of any kind that interfere in any way with any HIV test. That includes valtrex.

Question 9

are there any medications that cause false negative on pregnancy blood test? internet says so but i dont know if that is reliable.

Accepted Answer

Check Sources!: The internet can be a valuable tool, if sources of the info are cited and appear reliable.  Promethazine and diuretics can cause false negative serum pregnancy tests.  See this site, and see that that source of the info is listed, by Oxford University Press.

https://www.verywellfamily.com/blood-pregnancy-tests-906667

Also note that this article is written by a PhD with a MD supervising.

Question 10

4 years ago i had multiple unprotected sex with hiv+ men(who is not on medication). got tested with the 4th generation ag/ab blood test after 29 days with inconclusive results then repeat the test after 44,91days also 3 years. is it false negative?

Accepted Answer

: All tests have false negatives but seems unlikely.  Discuss with local Drs who knows what the prob is in women like you who live where you live.  Time will tell.

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Doctor answers about:

Pseudo medication

A member asked:

Why do child medications have artificial flavors?

A member asked:

Which medications will cause false positive ua results?

A member asked:

What prescription medication would give a false positive for thc?

A member asked:

What medication effects a methacholine challenge causing false negatives? in detail please?

A member asked:

What medications could easily lead to a false positive for amphetamine on a drug test?

A member asked:

How long on average does hydromorphone stay in the system? is it in any other medications, or will another medication lead to a false positive

A member asked:

What factors can contribute to a false positive pregnancy test? i'm not on any medication and an curious if my positive result might be incorrect.

A member asked:

I have a question: what is the effect of the valtrex medication on the result of the hiv test to be a false negative? is there an effect that had a negative test while taking suppressive valtrex?

A member asked:

Are there any medications that cause false negative on pregnancy blood test? internet says so but i dont know if that is reliable.

A member asked:

4 years ago i had multiple unprotected sex with hiv+ men(who is not on medication). got tested with the 4th generation ag/ab blood test after 29 days with inconclusive results then repeat the test after 44,91days also 3 years. is it false negative?

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