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
Opiates Class
*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
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
Amounts Needed
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.

SDRL Logo  © San Diego Reference Laboratory  800.677.7995