TOXICOLOGY LABORATORY TECHNICAL BRIEF by Dr. Joseph Graas, Ph.D.
The following list of drugs that could affect a drug test is for informational purposes only.
Drug Name
Immunoassay Testing
Confirmation Testing
Acetaminophen w/Codeine
Opiates Class
Codeine/Morphine
*Message: Codeine > Morphine
Adderall
Amphetamines Class
Amphetamine Only
Alprenolol
None
None
Amytal
Barbiturates Class
Amobarbital
Bromazepam
Benzodiazepines Class
None
Buprenorphine
Buprenorphine Class
Buprenorphine
Butisol
Barbiturates Class
Butalbital
Celebrex
None
None
Claritin
None
None
Clonazepam
Benzodiazepines Class
Clonazepam
Dalmane
Benzodiazepines Class
Desalkylflurazepam
Darvocet
Propoxyphene Class
Propoxyphene
Depakine
None
None
Desoxyn
Amphetamines Class
Methamphetamine
Dormisan
Barbiturates Class
None
Effexor
None
None
Elixir
Barbiturates Class
Phenobarbital
Fentanyl
Fentanyl Class
Fentanyl
Fioricet w/Codeine
Barbiturates Class
and
Opiates Class
Butalbital
Codeine/Morphine
*Message: Codeine > Morphine
Floxin
None
None
Gabapentin
None
None
Hydralazine
None
None
Indocin
None
None
Jantoven
None
None
Kadian
Opiates Class
Morphine
Ketamine
None
None
Lamotrigine
None
None
Lorazepam
Negative
Lorazepam
Marinol
THC
THC
Masmoran
None
None
Maxeran
None
None
Nembutal
Barbiturates Class
Pentobarbital
Norflex
None
None
Nortriptyline
None
None
Nyazin
None
None
Octamide
None
None
Ofloxacin
None
None
Opana
Oxycodone Class
Oxymorphone
Oxycontin
Oxycodone Class
Oxycodone / Oxymorphone
Panadol
None
None
Paroxetine
None
None
Percocet
Oxycodone Class
Oxycodone / Oxymorphone
Procaine
None
None
Prosed
None
None
Pseudoephedrine
Amphetamines Class
***High Amounts Needed
None
Pyridium
None
None
Quinatime
None
None
Resertia
None
None
Restoril
Benzodiazepines Class
Temazepam, Oxazepam
Rhumalgan
None
None
Ritalin
Amphetamines Class
None
Robitussin
None
None
Rohypnol
Benzodiazepines Class
None
Septra
None
None
Serax
Benzodiazepines Class
Oxazepam
Seretide
None
None
Seroquel
None
None
Tebamide
None
None
Tensopril
None
None
Teramine
None
None
Thiothixene
None
None
Tranquizine
None
None
Tylenol
None
None
Tylenol w/Codeine
Tylenol 1, 2, 3, 4
Opiates Class
Codeine/Morphine
*Message: Codeine > Morphine
Urabeth
None
None
Urea
None
None
Uristat
None
None
Valergen
None
None
Valium
Benzodiazepines Class
Nordiazepam,
Temazepam, Oxazepam
Valmid
None
None
Velosef
None
None
Vermox
None
None
Versed
Benzodiazepines Class
None
Vicks Inhaler
***Amphetamines Class
***EXTREMELY High
Amounts Needed
l-Methamphetamine/
l-Amphetamine
GCMS ONLY
Vicodin
Opiates Class
Hydrocodone / *Hydromorphone
*Large amts of Hydrocodone needed to have Hydromorphone
Warfarin
None
None
Wellbutrin
None
None
Xanax
Benzodiazepines Class
Alprazolam
Zarontin
None
None
Zestril
None
None
Zocor
None
None
Zyban
None
None
Zyrtec
None
None
This information provided is intended to aid the clinician with information of drugs that could affect a drug test. New drugs are constantly being prepared, prescribed, or abused by means of taking more then the recommended amount. This can alter how samples react while being tested.