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.
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