I have an employee, who claims to have been taking perscription diet
pills when she failed the last 2 urinalysis drug screenings.  She
tested positive for methamphetamines.  Not being able to produce a
perscription for this I find myself at a loss.  Can you please give me
a list of perscription diet pills that would cause this?  She is
supposed to meet with me tommorro so we can discuss her results. I
just want to be prepaired for this, and if you have any other
suggestions they would be greatly apriciated. THANKS, CARE&BLESS S.P.

Hello.

Below are drugs that contain amphetamine or methamphetamine or
metabolize to those substances (and therefore could result in someone
testing positive for methamphetamines):

Adderall
Benzedrine
Biphetamine
Dexedrine
Durophet
Obetrol
Desoyn (Gradumet)
Benzphetamine (Didrex)
Dimethylamphetamine
Famprofazone
Fencamine
Furfenorex
Selegiline (Deprenyl, Elderpryl)
Amphetaminil
Clobenzorex (Dinintel, Finedal)
Ethylamphetamine
Fenethylline (Captagon)
Fenproporex (Tegisec)
Mefenorex (Pondinil)
Mesocarb
Prenylamine 

source:
List of Prescription and Nonprescription Drugs that Could Affect a Drug Test
SAN DIEGO REFERENCE LABORATORY
http://sdrl.com/tech_briefs/DrugsThatAffectATest.html

The same list appears in the U.S. Department of Health and Human Services'
Medical Review Officer Manual for Federal Workplace Drug Testing
Programs, hosted by health.org
http://www.health.org/workplace/mromanual.aspx

Also see:

Amphetamines - Substances or Conditions which can cause false positives

"Prescription medications (Amfepramone, Cathne, Etafediabe,
Morazone,phendimetrazine, phenmetrazine, benzphetamine, fenfluramine,
dexfenfluramine,dexdenfluramine,Redux, mephentermine, Mesocarb,
methoxyphenamine, phentermine,amineptine, Pholedrine,
hydroymethamphetamine, Dexedrine, amifepramone,
clobenzorex,fenproyorex, mefenorex, fenelylline, Didrex,
dextroamphetamine, methphenidate, Ritalin,pemoline, Cylert,
selegiline, Deprenyl, Eldepryl, Famprofazone)"
source: passyourdrugtest.com
http://www.passyourdrugtest.com/false-positives.htm

--------------

Brand names for some of these prescription diet drugs vary by country.  

Here are some other brand names that you might encounter:

clobenzorex (Mex.: Asenlix®, Fr.: Dinintel®, Spain: Finedal®)

fenproporex (Ger.: Appetizugler®, Mex.: Fenisec®, Spain: Antiobes
Retard®, Dicel® Falagan®, Grasmin®, Tegisec®)

mefenorex(Arg.: Doracil®, Fr.: Incital®, Ger.: Rondimen®, Spain, Switz.: Pondinil®)

source: Drug Free Workplace: AMPHETAMINES, cached by Google:
http://snipurl.com/4y83

-----

search strategy:
"diet pills" "test positive for"
fenproporex didrex "test positive"

I hope this helps.

Howdy spanishprincess-ga,

Certainly the employee should be able to give you the name of the
physician who wrote the perscription, and should be able to give
you a release so you can ascertain the facts.

Looking Forward, denco-ga - Google Answers Researcher