Hi, Love42 !
As Justaskscott pointed out, it?s difficult to narrow this down for
you without knowing what medication you are taking.
And, as he suggests, many people take vitamin supplements and natural
herbal remedies without realising these are essentially medications -
so they don?t mention them to their health professional. Ma Huang, for
example, is a natural source of ephedrine.
That said, there are many reasons for a false positive result to show
up, though the marketers of tests - particularly those
?try-it-at-home? tests - have every reason not to draw your attention
I?ve put what seem to me to be the more credible sources first.
NOTE especially that kidney and liver problems and diabetes can cause
false positives, so PLEASE see your doctor to rule out these problems.
The best site I found was:
Note: I have reformatted slightly for clarity.
?Substances or Conditions which can cause false positives
Ephedrine, pseudoephedrine, propylephedrine, phenylephrine, or desoxyephedrine
(Nyquil, Contact, Sudafed, Allerest, Tavist-D, Dimetapp, etc)
Phenegan-D, Robitussin Cold and Flu, Vicks Nyquil
Over-the-counter diet aids with phenylpropanolamine (Dexatrim, Accutrim)
Over-the-counter nasal sprays (Vicks inhaler, Afrin)
Asthma medications (Marax, Bronkaid tablets, Primatine Tablets)
Prescription medications (Amfepramone, Cathne, Etafediabe, Morazone,
...phendimetrazine, phenmetrazine, benzphetamine, fenfluramine, dexfenfluramine,
...dexdenfluramine,Redux, mephentermine, Mesocarb, methoxyphenamine, phentermine,
... amineptine, Pholedrine, hydroymethamphetamine, Dexedrine,
...fenproyorex, mefenorex, fenelylline, Didrex, dextroamphetamine,
...pemoline, Cylert, selegiline, Deprenyl, Eldepryl, Famprofazone)
Kidney infection, kidney disease
Liver disease, diabetes?
A similar list can be found at:
?Over-the-counter cold and allergy remedies that contain ephedrine,
pseudoephedrine, propylephedrine, phenylephrine or desoxyephedrine:
Nyquil, Contactd, Sudafed, Allerest 12-Hour, A.R.M., Triaminic 12,
Ornade, Tavist-D, Dimetapp, Sinex, Neosynephrine, Actifed, Bayer
Selectd Maximum Strength Sinus Pain Relief Caplets, Contact Non-Drowsy
Formula Sinus Caplets, Dristan Cold Caplets, Maximum Strength Sine-Aid
Tablets, Maximum Strengeth Sudafed Sinus Caplets, Maximum Strength
Tylenol Sinus Gelcaps, No Drowsiness Sinarest Tabs, Sinus Excedrin
Extra Sterength Caplets, Characol Sinus, Drixoral Cold and Flu,
Efidac/24, Phenegan-D, Robitussin Cold and Flu.
Over-the-counter diet aids containing phenylpropanolamine: Dexatrim, Accutrim.
Over-the-counter nasal sprays: Vicks inhaler, Afrin. Asthma
medication: Marax, Bronkaid tablets, Primatine Tablets.
Prescription medication: Amfeprainone, Cathne, Etafediabe, Morazone,
phendimetrazine, phenmetrazine, benzphetamine, fenfluramine,
dexfenfluramine, dexdenflurarnine, Redux, mephentermine, Mesocarb,
methoxyphenamine, phentermine, amineptine, Pholedrine,
hydroymethamphetamine, Dexedrine, amifepramone, clobenzorex,
fenproyorex, mefenorex, fenelylline, Didrex, dextroamphetamine,
methphenidate, Ritalin, pemoline, Cylert, selegiline, Deprenyl,
I would add Demazin to that list.
Now let?s look at the tests themselves.
?TestMedica Methamphetamine Drug Screen diagnostics are a quick and
easy way to check for specific parameters in the urine. The detection
of these parameters and their levels may be indicative of an
abnormality or an infection.?
This confirms the possibility of a disease process as noted above, as
well as a positive result for drug use.
?the drug has a half-life of 9-24 hours in the body. Methamphetamine
is excreted in the urine primarily as amphetamine and oxidized and
deaminated derivatives. However, 10-20% of Methamphetamine is excreted
unchanged. Thus, the presence of the parent compound in the urine
indicates Methamphetamine use. Methamphetamine is generally detectable
in the urine for 3-5 days, depending on urine pH level.?
? 2. There is a possibility that technical or procedural errors, as
well as other interfering substances in the urine specimen may cause
3. Adulterants, such as bleach and/or alum, in urine specimens may
produce erroneous results regardless of the analytical method used. If
adulteration is suspected, the test should be repeated with another
4. A Positive result does not indicate level or intoxication,
administration route or concentration in urine.
6. Test does not distinguish between drugs of abuse and certain medications.?
OneStep test - this site emphasises that sterile glass or plastic
containers must be used for sample collection and that the stability
of the kit is affected if it is kept beyond the Expiry date.
DetectNow home test kit instructions.
?Methamphetamine Test is a two part field test reagent for the
detection and identification of methamphetamine and other secondary
amines. Methamphetamine Test utilizes a modified Simon reagent.
Product modifications have been incorporated to reduce the number of
false positives, stabilize the traditional Simon reagent and eliminate
sensitivity to temperature extremes.?
Note positive results for ?other secondary amines.?
?DETECT NOW IS AN AID IN ATTEMPTING TO IDENTIFY THE PRESENCE OF
....(drugs). A POSITIVE TEST INDICATES THE PROBABILITY OF THE PRESENCE
OF AN ILLEGAL DRUG. HOWEVER, THERE ARE OCCASIONS WHEN THE TEST WILL
SHOW A FALSE POSITIVE READING FOR UNCONTROLLED SUBSTANCES. FOR
EXAMPLE, THE FOLLOWING SUBSTANCES WILL SHOW A FALSE READING WHEN THE
DETECT NOW IS APPLIED: FOR COCAINE OR CRACK TEST KIT; DIBUTACAINE,
BUTACAINE, METHAPYRILENE. FOR MARIJUANA TEST KIT; NUTMEG OR HENNA...
...A POSITIVE RESULT DOES NOT MEAN THAT AN INDIVIDUAL IS USING
.....(drugs).... BUT COULD REFLECT THAT SUCH AN INDIVIDUAL MERELY HAS
COME IN CONTACT WITH SUCH DRUGS OR OTHER REASONS FOR A FALSE POSITIVE
Usage instructions for the kit give specific details for avoiding
cross-contamination - so cross-contamination remains a possibility.
?Amines are organic compounds containing nitrogen as the key atom in
the amine functional group. Amines have structures resembling ammonia,
where one or more hydrogen atoms are replaced by alkyl groups or other
groups where the nitrogen is bonded to a carbon atom in the group.....
.... if only one the hydrogens in ammonia is replaced by a carbon
based group, then it is a primary amine. If two of the hydrogens are
replaced by two carbon based groups, then it is a secondary amine.?
Note: amines are chemically related to alum, mentioned above as an
adulterant that can produce a false positive result.
You are probably aware that natural ephedra is related to
methamphetamine. Here is a good summary of why testing may confuse the
?False positive for methamphetamine on drug tests of people using ephedra:
Q: Can taking ephedra (also called ma huang) cause a "false positive"
for methamphetamine on a drug test?
A: A variety of different tests are used for drug testing. However,
many of them can give a false positive result, in the sense that
ephedra use will show up as drug use. (In particular, ephedra use may
generate a positive finding for methamphetamine.)
One active component in ephedra is ephedrine?which has
pharmaceutical properties and is in the same class of compounds as
many other drugs and natural stimulants. As such, it will be
metabolized similarly to these other substances.
Much drug testing checks for the presence of drug metabolites as a
measure or indicator of ingested drug. By the time one tests blood or
urine for the drug, the body has metabolized most of it, so many tests
are directed towards testing for metabolites.
There may also be other components in ephedra with metabolites or
parent structures that are similar to drugs taken for pleasure or
sports and would therefore test positive. Like other botanical
products, ephedra contains scores, perhaps even hundreds of different
Drug tests are usually designed for ease of use and are
broad-based, so that a single test would detect many different drugs.
Thus, it can be difficult to differentiate between an actual
drug/pharmaceutical or a natural product/supplement like ephedra.
Such differentiation can usually be done by further, intensive
testing that is targeted for a particular unique metabolite or
residual drug itself.?
On the same subject, look at
?I have been retained to investigate the possible causes of a positive
test for amphetamine in the urine of a person taking Ma Huang (Formula
One) a natural source of ephedrine.
The conversion of ephedrine to methamphetamine requires a simple
reduction of the alpha-hydroxyl. The drug-testing companies rule out
the possibility that ephedrine may be converted in small amounts to
methamphetamine in the body. It seems plausible that either the
individual metabolic makeup or bacterial fermentation ...could
accomplish this conversion.
Anyone ever heard of this?
PS they eliminate a-hydroxyls with periodate and say it is impossible to
generate the MA as artifact after treatment
Robert Read, DVM, PhD
This has been reported before: see Autry, J.H.; Notice to all DHHS/NIDA
certified laboratories, Division of Applied Research, NIDA, Rockville,
The periodate oxidation is a usual precaution to eliminate ephedrine in the
urine specimen. I understand that methamphetamine is metabolized to
amphetamine, so one should test for both methamphetamine and amphetamine
to make a positive confirmation of methamphetamine ingestion. If no
amphetamine was detected, then the methamphetamine may be an artifact.
Robert B. Cody, Ph.D
JEOL USA, Inc.?
And finally, some forum comments, not necessarily particularly accurate:
?The VICK inhaler sold in the UK is fine, but the VICK inhaler sold in the US
contains methamphetamine - the banned substance.
Methamphetamine is present in two different forms; "d" and "l". Street
methamphetamine is predominantly d -Methamphetamine. The over-the-counter
medication, Vick's Inhaler (and the Walgreen equivalent), contains
exclusively the "l" form of methamphetamine (the listed active ingredient
is l-Desoxyephedrine, another name for l -Methamphetamine). Although it
is uncommon, the heavy use of Vick's Inhaler can cause a positive urine
test for methamphetamine. The claim that Vick's Inhaler is the source of
a positive methamphetamine test can be checked by testing for "d" versus
"l" methamphetamine. This test is performed by GC/MS.?
?I walked in to the place one morning, after doing a
nice assortment the day/night before. about 7g (2 balls) cocaine, three
pills, half bottle of vodka, 3.5 or so grams of weed, 1-1.5g K. There
might have been something else in there somewhere, but it remains hazy.
( My comment - he?s lucky to be alive.)
Anyways, I get dropped the following day ...
Results came back.
High nanogram level of THC.
Barely over threshold level of cocaine.
Nothing else. I was still breathing off booze, the MDMA was finally
becoming completely inactive on my brain, leaving me cracked, and I was
still lockjawed and firey-eyed but hurting from the coke. Yet, that's
all that came up.
Other times, Various things didn't come up. The one that always got me,
and did, as (sic) weed though.?
Good luck. Please get those medical checks for diabetes or kidney or
?Methamphetamine test? false positive