Qualitative Liquid Chromatography-Tandem Mass Spectrometry
Qualitative Liquid Chromatography-Tandem Mass Spectrometry
In 2020, more than 59 million people in the United States used illicit drugs. Furthermore, according to recent preliminary data from the Drug Abuse Warning Network (DAWN), opioids, methamphetamine, cannabis, and cocaine were among the top substances involved in emergency room visits. Other substances, such as prescription medications, are also common factors in the need for emergency medical care. For situations in which the identity or class of one or more drugs is unknown, multidrug analysis may be useful.
Test Interpretation
Sensitivity/Specificity
- Analytic sensitivity: dependent on the cutoff concentrations for applicable analytes (127 analytes included). The concentration at which a drug or metabolite can be detected varies within a drug class. See below for a complete list of analytes and cutoff concentrations.
- Specificity: high; mass spectrometric methodology.
Drug Class/Drug/Drug Metabolite | Drug Profile, Expanded Targeted Panels Cutoff Concentrations (ng/mL) |
---|---|
Anticoagulants | |
Apixaban | 25 |
Rivaroxaban | 25 |
Warfarin | 100 |
Anticonvulsants | |
Brivaracetam | 100 |
Carbamazepine | 100 |
Carbamazepine-10,11-epoxidea | 100 |
Felbamate | 100 |
Gabapentin | 100 |
Lacosamide | 100 |
Lamotrigine | 100 |
Levetiracetam | 100 |
Oxcarbazepine | — |
10-hydroxycarbazepinea | 100 |
Pregabalin | 100 |
Primidone | 100 |
Rufinamide | 100 |
Tiagabine | 5 |
Topiramate | 100 |
Zonisamide | 100 |
Antidepressants | |
Amitriptyline | 50 |
Nortriptylineab | 50 |
Bupropion | 5 |
Hydroxybupropiona | 5 |
Citalopram | 5 |
N-desmethylcitaloprama | 5 |
Clomipramine | 50 |
Desipramine | 50 |
Doxepin | 50 |
Desmethyldoxepina | 50 |
Duloxetine | 50 |
Fluoxetine | 10 |
Norfluoxetinea | 50 |
Imipramine | 50 |
N-desmethyltrimipraminea | 50 |
Mirtazapine | 5 |
Paroxetine | 10 |
Protriptyline | 50 |
Sertraline | 20 |
Trimipramine | 50 |
Venlafaxine | 10 |
O-desmethylvenlafaxinea | 10 |
Antidiabetics | |
Glimepiride | 50 |
Glipizide | 50 |
Glyburide | 50 |
Antihistamines | |
Chlorpheniramine | 100 |
Diphenhydramine | 20 |
Doxylamine | 50 |
Hydroxyzine | 5 |
Pheniramine | 5 |
Antipsychotics | |
Aripiprazole | 50 |
Clozapine | 10 |
N-desmethylclozapinea | 10 |
Haloperidol | 5 |
Loxapine | 5 |
Quetiapine | 5 |
Risperidone | 5 |
9-hydroxyrisperidonea | 5 |
Trazodone | 50 |
Ziprasidone | 5 |
Benzodiazepines | |
Alprazolam | 5 |
Alpha-hydroxyalprazolama | 20 |
Chlordiazepoxide | 20 |
Clobazam | 20 |
Clonazepam | 5 |
7-aminoclonazepama | 5 |
Diazepam | 20 |
Nordiazepamab | 20 |
Oxazepamab | 20 |
Temazepamab | 10 |
Lorazepam | 20 |
Midazolam | 5 |
Alpha-hydroxymidazolama | 20 |
Zolpidem | 5 |
Cardiac Medications | |
Atenolol | 20 |
Atropine | 5 |
Diltiazem | 10 |
Disopyramide | 100 |
Flecainide | 50 |
Lidocaine | 100 |
Metoprolol | 5 |
Mexiletine | 50 |
Propafenone | 50 |
Propranolol | 10 |
Sotalol | 50 |
Verapamil | 10 |
Norverapamila | 10 |
Cough Suppressants | |
Dextromethorphan | 5 |
Muscle Relaxants | |
Baclofen | 20 |
Carisoprodol | 100 |
Cyclobenzaprine | 5 |
Meprobamate | 100 |
Nicotine | |
Cotinine | 5 |
NSAIDs | |
Acetaminophen | 100 |
Opioids | |
Buprenorphine | 5 |
Norbuprenorphinea | 5 |
Codeine | 5 |
Dihydrocodeine | 5 |
Fentanyl | 2 |
Norfentanyla | 5 |
Heroin | — |
6-acetylmorphinea | 5 |
Hydrocodone | 5 |
Hydromorphoneab | 5 |
Meperidine | 10 |
Normeperidinea | 10 |
Methadone | 10 |
EDDPa | 10 |
Morphine | 5 |
Naloxone | 10 |
Oxycodone | 5 |
Oxymorphoneab | 5 |
Tapentadol | 5 |
N-desmethyltapentadola | 5 |
Tramadol | 10 |
O-desmethyl-cis-tramadola | 100 |
Sedative-Hypnotics | |
Ketamine | 20 |
Norketaminea | 20 |
Stimulants | |
Amphetamine | 10 |
Cocaine | 10 |
Benzoylecgoninea | 20 |
Cocaethylenea | 10 |
Ephedrine | 10 |
Methamphetamine | 10 |
Methylenedioxymethamphetamine (MDMA) | 10 |
Methylphenidate | 5 |
Ritalinic acida | 5 |
Phencyclidine (PCP) | 5 |
Phentermine | 10 |
Pseudoephedrine | 5 |
aSubstance is a metabolite of the preceding parent drug. bSubstance can be administered as a prescription drug. |
Results
Result | Clinical Significance |
---|---|
Detected | One or more drug analytes were detected in the sample |
Not detected | No drug analytes were detected Result does not exclude the possibility of drug use or exposure |
Limitations
- Minimum reporting limits and estimated concentrations are established for each compound, but quantitative results are not reported.
- Drug concentrations must be greater than or equal to the cutoff to be reported as positive.
- Drug detection depends on specimen quality and the timing of specimen collection relative to drug exposure.
References
-
SAMHSA - 2020 NSDUH annual national report
Substance Abuse and Mental Health Services Administration. 2020 NSDUH Annual National Report. Published Oct 2021; accessed Jul 2022.
-
SAMHSA - 2021 drug abuse warning network (DAWN)
Substance Abuse and Mental Health Services Administration. 2021 Drug Abuse Warning Network (DAWN) releases. Accessed Jul 2022.
Use to detect drug exposure from among a targeted list of prescriptions, over-the-counter medications, and illicit drugs. Assays are for medical purposes only—not for forensic testing. Not recommended to determine medication compliance or to assess for undisclosed drug/substance use in the context of pain management, substance use disorder treatment, or any other pharmacotherapies involving controlled substances.