The simple answer to your question is that false positives happen, yet
no one is listening. People are losing their jobs over false
positives. There's an excellent example in the links below.
Opiates is a broad category and includes MANY over the counter
medications, as well as heroin.
The opiate category includes: Codeine, Morphine, and Heroin
Some Brands and Generic Names
Raw Opium, Opium, Codeine, Morphine, Heroin, Hydromorphone (Dilaudid),
Oxycodone (Percodan), Oxymorphone (Numorphan), Hydrocodone (Vicodin),
Meperidine (Demerol), Fentanyl, Methadone (Dolophine), Darvon, Talwin.
If your son is on opiates, it would be obvious.
First, inspect his arms, legs, hands, and ankles, as heroin is usually
injected. No needle marks does not mean he is clean, but it is
excellent news. Heroin can also be snorted and smoked, but those types
of ingestions are usually indicitive of someone experimenting, not yet
If your son is doing well in school, interacting normally with the
family, getting the same grades he was getting a year ago and they are
passing and above average, his hygiene is good, is not lying and
stealing, I would bet he is not using opiates.
Common signs of opiate addiction
List of signs comes from the Mayo Clinic
I personally have received a false positive for amphetimines when I
was on a prescribed drug, Cylert (pemoline). No one listened to me.
First, look here:
OTHER "FALSE POSITIVE" QUESTIONS AT GOOGLE ANSWERS
HAVE FALSE POSITIVE DRUG TEST?
..." According to a report by the Los Angeles Times New Service, a
study of 161 prescription and over the counter medications showed that
65 of them produced false positive drug test results in the most
widely administered urine test..."
Look at THIS list:
False Positive Drug Test Information
OPIATES [morphine, codeine, heroin]
Prescription medications that contain Morphine:
MS Contin Tablets®
Prescription medications that contain Codeine:
Actifed with Codeine Cough Syrup®
Aspirin with Codeine
Capital and Codeine Oral Solution
Dimetane-DC Cough Syrup®
Empirin with Codiene®
Fiorcet with Codeine®
Fiorinal with Codeine®
Phenaphen with Codeine®
Promethazine VC with Codeine
Soma with Codeine
Triaminic Expectorant with Codeine ®
Tylenol with Codeine®
Tylenol with Codeine(#1,2,3, or 4)®
NOTE: List is only a representative sample of the prescription
medications that contain Codeine or Morphine.
Nonprescription products that contain Opium:
Kaodene with Paregoric ®
Nonprescription product that contains Codeine:
Kaoden with Codeine®
Note: The listed nonprescription products are used as Antidiarrheals.
They are generally available over-the-counter, however,
nonprescription sale is prohibited in some states. Paregoric alone is
a Schedule III prescription drug, but in combination with other
substances in a Schedule 5 over-the-counter product.
Substances that metabolizes to Morphine: Heroin
Note: There are a number of synthetic or semisynthetic Opiates
available including, but not limited to:
hydromorphine - (Dilaudid®)
dihydrocodeine - (Paracodine®)
oxymorphone - (Numorphan®)
oxycodone - (Percodan®)
hyrocane - (Hycodan®)
propoxyphene - (Darvon®)
methadone - (Dolophine®)
buprenorphine - (Buprenex®)
These drugs do not metabolize to either codeine, morphine or
6-acetylmorphine. When a doctor presents a prescription for a
narcotic analgesic, the MRO should verify that it does not contain
codeine, morphine, or 6-acetylmorphine.
Food items that contain morphine: Poppy Seeds
Note: Eating normal dietary amounts of poppy seeds can cause urine
specimen to test positive for morphine and ( possibly) codeine. The
concentration of morphine can be substantial, and usually very low
concentrations or no detectable codeine.
Drug Testing - False Positives
Decongestants and Cold Remedies
Phenylpropanolamine and ephedrine are both substances found in many
over-the-counter cold remedies. They can result in a drug test false
positive for amphetamines on the EMIT test. Antitussives, to suppress
coughs, such as dextromethorphan and perylamine may cause a drug test
false positive for opiates.
Aside from when this class of drugs is specifically tested for, some
of them including amitriptyline can test positive for opiates for up
to three days after use. Even quinine in tonic water can also cause a
positive result for opiates.
Poppy seeds which are usually found on bread contain traces of
morphine and can lead to positives for opiates. Codeine, which is
found in many pain relievers, may cause a false positive for morphine
or heroin because of its similar chemical structure. ..."
Check out this search string:
"false positive for opiates"
And this document was prepared by a DRUG TESTING FACILITY!!
TOXICOLOGY DRUG TESTING TID BITS
Until I had absolute irrefutable proof that my son was using ILLEGAL
opiates (heroin), I would support him and try to determine the source
of his false positive. Maybe he got a pill from a friend and it felt
good but he had no idea it was an opiate. As you can tell from the
lists above, it is entirely possible to test positive for opiates and
have took something that is straight off the drug store shelf.
If I can assist further in this topic, please don't hesitate to ask
via the "Request FOr Clarification" feature.
"false positives" opiates
other similar questions here at Google Answers
Clarification of Answer by
08 Mar 2005 09:58 PST
I assume this is a matter of trust. You want to trust your son.
The category of Opiates is too broad. Did they say WHAT opiate your
son was positive for? It could be a number of things, not necesarily
If your son is not an addict, I think it's likely he took something,
knowingly or unknowingly, that gave him a true positive. It doesn't
mean it was heroin, or an illegal drug. It was most likely codeine.
Codeine is in many prescription drugs, OTC medications, and even some
Why don't you take your son in to get a hair test? If he has not died
his hair, this is as near to 100% as it gets. It's expensive, and
highly accurate. If the hair test shows no drug use, then I would
feel comfortable supporting my son.
..."The amount of codeine allowable by law in OTC products is 8mg per
unit dose of a drug. A example is 325mg of acetaminophen (a unit dose
of acetaminophen) and 8mg codeine per tablet. This law is used to
prevent the excessive use of codeine as one would have to take doses
reaching toxicity of acetaminophen before any real problems with the
codeine administration would occur. It's the same situation with
aspirin. With OTC cough medications, the highest amount of codeine
allowed is 3.3mg/ml. This concentration is _so_ low that this FAQ will
not be discussing cough syrups as a source of recreational codeine.
The tablet form of OTC codeine products usually also includes 15mg of
caffeine in each standard dose..."
There are measureable false positives with GS/MS testing, but the
chance is unlikely:
Drug Testing Method Information
GAS CHROMATOGRAPHY/MASS SPECTROMETRY
..."Purpose: This method is used to confirm positive results obtained
from Thin Layer Chromatography or Enzyme Multiplied Immunoassay tests,
thereby drastically reducing the likelihood of a false positive
"Drastically reduce" does not mean eliminate. Reputable sources
cannot conclusively say it is 100% accurate, only NEAR 100%. I will
admit, it is virtually impossible that the test is wrong, but the
possibility DOES exist. The problem is that this is the best test,
the most accurate test available. Even though there is a statistical
possibility (and I'm sure real life examples that resulted in these
statistics) ...that the test could be wrong, the drug testing industry
has labeled it as 100% accurate. In reality it is 99.xxx reliable.
There's even a "false negative" listed for Cocaine in the TidBits link
I gave you. That's not 100% accurate.
A Big Question: Is the lab that did the testing NIDA Certified?
Drug testing accuracy and standards
..."Many human errors occur in labs and cause inaccurate results. Some
are careless or irresponsible errors, and some errors are accidents.
Human error can ruin the results of ANY test, screening or
3.2 False positives: (same link)
No laboratory process is completely free from error. The GC/MS test is
virtually error free, but the EMIT is far from accurate.
3.3 True positives (legitimate): (same link)
Some legal products actually contain small amounts of illegal
chemicals. All tests, including the GC/MS, will test you positive
because the metabolites derived from the true positive are identical
to the metabolites of the illegal drugs. One exception: poppy seeds
will not cause a positive GC/MS (explained below).
Drug Testing Toxicology
..."Confirmation testing is the second step of testing following the
detection of a positive result on the preliminary or screening test.
The purpose of confirmation is to eliminate any false positive results
that may have originated from an initial screening process. To
eliminate false positive test results, a confirmation test that is
highly specific and possibly more sensitive should be used. It is
important to note that confirmation testing is not the same as repeat
testing in that running the same test a second time does not eliminate
systematic errors. More specific confirmation tests used to identify
drugs of abuse are generally thought to be of three types:
- Gas liquid chromatography (GC)
- High performance liquid chromatography (HPLC)
- Gas chromatography with mass spectrometry (GC/MS)
All three of these methods are both highly specific and sensitive to
small quantities of the particular drug being tested. GC/MS is the
most specific and sensitive of the three methods. Consistent with FDA
position, Varian, Inc. strongly recommends confirmation testing using
GC/MS in situations requiring a confirmed analytical result..."
Indeed, the GC/MS method can be fooled.
Here's an example - SCROLL DOWN TO:
Drug Test Interaction With Medicines And Foods - THEN: Ibuprofen,
contained in Advil, Nuprin, and Mortin,
..."Ibuprofen in very high doses will still interfere with both the
EMIT and the GC/MS (Gas Chromatograph/Mass Spectrometer) test.
Ibuprofen: Ibuprofen is a common pain reliever that (even in low
dosages) used to cause a false THC positive on the EMIT test. The EMIT
has been changed to use a different enzyme to eliminate false
positives due to Ibuprofen. Ibuprofen in very high doses will still
interfere with both the EMIT and the GC/MS. There is some conflicting
data here because some sources say that the GC/MS tests can
distinguish between Ibuprofen and THC (as well as other
HOW ACCURATE ARE THE DRUG TESTS?
An interesting discussion:
..."Despite the numerous techniques, only gas or liquid chromatography
coupled with mass spectrometry is the acceptable confirmation
technique for quantification of opiates - morphine and codeine..."
In closing, I again say that the category of opiates is too broad.
Here's what I would say ...."Opiates? So what. My son is not an
addict. Be more specific and/or provide proof of his illegal drug
use. Codeine is not illegal and can be purchased at the corner drug
store. I will discuss with him what OTC medications have Codeine in
them so he can avoid them in the future. If you have a clean hair
test as well, I'd stand by him.
Does this help?