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.