Let me attempt to answer your question with this information I've
garnered. I've checked out each drug you listed and tried to find an
article about it online. So far, here are a few:
First, let me show you a simple but informative FAQ:
Craig Medical - Drug Test FAQ
Next, a list of drugs that may cause false positives, which is
appropriately on a site about passing drug tests:
Medications & Substances Causing False Positives - Pass Your Drug Test .com
Next, I will list the drugs you mentioned and one by one state if it
is on the list I found, or if there are sources mentioning it as
possible cause of a false positive:
Doxepin - No source seen to prove it causes false positive
The Drug Testing FAQ (v. 4.11)
- Carbamazepine is shown to appear in EMIT part of drug test.
Article - Tests on Trial - Jobs and Reputations Ride on Unproven Drug Screens
- "Robitussin and diet pills can give a false reading for amphetamines."
By the way, read the introduction to get an idea on how certain drug
test cases can turn out. The inaccuracy may not be in the test, but in
the persons concerned, whether doing testing or being tested.
Erythromycin - No source seen to prove it causes false positive
Advair - No source seen to prove it causes false positive
Albuterol - No source seen to prove it causes false positive
Prednisone - No source seen to prove it causes false positive
Antiphospholipid Antibodies: The Test
"Occasionally, antiphospholipid testing may be ordered to help
determine the cause of a positive VDRL/RPR test for syphilis. The
reagents (chemicals) used to test for syphilis contain phospholipids
and can cause a false positive result in patients with
RXlist Forum - Re: percocet and drug tests, posted 16 January 2004
- This posting mentions Hydroxycut as a diet pill that the poster was
using. Also, based on a previous reference I've mentioned here,
Hydroxycut is a possible false positive creator since it is a diet
St John's Wort
SPARC Website - Drug Testing 101
- Possible false positive causer.
listed in the Passyourdrugtest.com list, so it can cause a false positive.
In addition, most of the sites I've listed have tips on going through
your drug test. If you haven't seen them, it's best to be familiar
with them as much as you can.
Google Search strings:
(name of drug) drug test
(name of drug) drug test false
(name of drug) drug test false positive
I hope this has been helpful. If you need something clarified, or have
a problem with the answer, do please post a Request for Clarification
before rating and I'll come back to you as soon as I can. Thank you.