Substance Test Concentration (ng/mL) Substance Test Concentration (ng/mL)
6-Monoacetylmorphine 1,280 Desmethylcitalopram 250
11-Nor-9-carboxy THC 512 Desmethylclomipramine 500
6-Acetyl morphine 5 Desmethylsertraline 250
7-Amino clonazepam 125 Dextromethorphan 500
7-Amino flunitrazepam 125 Diazepam 500
Acetaminophen 25,000 Dihydrocodeine 100,000
α-OH-alprazolam 2,560 Diltiazem 500
Alprazolam 250 Diphenhydramine 500
Amantadine 250 Doxepin 500
Amitiptyline 500 Doxylamine 500
Amoxapine 600 Duloxetine 500
Amphetamine 12,800 Ecgonine methyl esther 500
Antipyrine 1000 EDDP 12,800
Atomoxetine 500 Ephedrine 100,000
Benzocaine 500 Fentanyl 256
Benzoylecgonine 3,200 Flunitrazepam 125
Brompheniramine 50 Fluoxetine 500
Bupivacaine 500 Flurazepam 125
Buprenorphine 1,280 Hydrocodone 6,400
Bupropion 500 Hydromorphone 6,400
Bupropion metabolite 1,000 Ibuprofen 25,000
Butalbital 5,000 Imipramine 500
Carbamazepine 5,000 Ketamine 500
Carisoprodol 6,400 Lamotrigene 5,000
Chlordiazepoxide 125 Lidocaine 1,000
Chlorpheniramine 500 Lorazepam 5,120
Chlorpomazine 500 Loxapine 250
Citalopram 250 Maprotiline 1,250
Clomipramine 125 MCPP 250
Clonazepam 500 MDA 100
Clonidine 250 MDEA 100,000
Clozapine 500 MDMA 12,800
Cocaethylene 100 Meclizine 600
Cocaine 100 Meperidine 500
Codeine 6,400 Meprobamate 6,400
Cyclobenzaprine 100 Mesoridazine 500
Desalkyflurazepam 500 Methadone 6,400
Desipramine 500 Methamphetamine 12,800
Desmethyldoxepin 500 Methylphenidate 50
Metoclopramide 500 Pentazocine 500
Midazolam 125 Phencyclidine 640
Midazolam 100 Phenobarbital 5,000
Mirtazepine 250 Phenylpropanolamine 100,000
Morphine 6,400 Phentermine 100,000
    Phenytoin 5000
Naproxen 100,000 Promethazine 500
Morphine-3-glucuronide 250 Propoxyphene 12,800
Norbuprenorphine 1,280 Psuedoephedrine 100,000
Norcodeine 100,000 Quetiapine 250
Nordiazepam 5,120 Sertraline 500
Norfentanyl 1,024 Strychnine 500
Norfluoxetine 500 Temazepam 6,400
Normeperidine 500 Thioridazine 500
Normorphine 100,000 Topiramate 5,000
Norpropoxyphene 12,800 Tramadol 3,200
Nortriptyline 500 Trazodone 1,000
Norverapamil 500 Triazolam 125
O- desmethylvenlafaxine 500 Trimethobenzamide 500
Olanzapine 600 Trimethoprim 500
Oxezepam 5,120 Varapamil 500
Oxycodone 6,400 Venlafaxine 500
Paraxanthine 100,000 Zolpidem 250
Paroxetine 500 Zopiclone 125
Table 2: Substances tested for interference in LC-MS/MS with test concentrations.
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