Drug test abbreviations,
decoded
MOP, FYL, mAMP, BZO, BUP, EtG: every code printed on a drug screen cup, a 14-panel drug test or a laboratory report, what it stands for, the screening cutoff, and how long each substance typically stays detectable in urine.
Updated October 16, 2026
Why the codes look the way they do
A urine drug test cassette has one strip per panel, and the strip is labelled with a three- or four-letter code because there is no room for the full name. The codes are short forms of the substance: AMP for amphetamine, COC for cocaine, THC for cannabis. A few panels have more than one spelling in circulation, which is where most of the confusion starts. The opiates panel is printed as MOP or OPI on many cups and laboratory reports and as MOR on a Testr report; fentanyl appears as FYL or FEN; methamphetamine as mAMP or MET. They screen for the same substances, though the cutoff beside the code can differ from one cup to another.
Grouped by what they screen for, the 14 codes are: stimulants, AMP, MET (mAMP), COC and MDMA; opioids, MOR (MOP or OPI), OXY, MTD, BUP and FEN (FYL); sedatives, BZO and BAR; and three that stand alone, THC, PCP and ETG. Beside them, pH, OX and CR are checks on the specimen rather than drug panels, covered further down.
Next to each code you will usually see a number in ng/mL. That is the screening cutoff: the level at or above which the strip reads positive. Below it the panel reads negative even when a trace is present, so a negative means below the cutoff rather than zero. Two cups can print the same code with different cutoffs, and the cutoff changes what a result means, which is why the table lists it beside every abbreviation.
Every abbreviation on a Testr drug test
All 14 panels are screened on every visit. Cutoffs are the on-site screening cutoffs; detection windows are typical ranges rather than guarantees, since how much was taken, how often, body weight and hydration all move them. The last column is what the laboratory measures when confirmation is added.
| Code | Panel | Screening cutoff | Typical detection window in urine | Confirmed at the laboratory as |
|---|---|---|---|---|
| AMP | Amphetamines | 500 ng/mL | 2-4 days after use | Amphetamine, Methamphetamine |
| MET also mAMP also MAMP | Methamphetamine | 500 ng/mL | 2-4 days after use | Amphetamine, Methamphetamine |
| THC | Marijuana (THC) tetrahydrocannabinol, the active compound in cannabis | 50 ng/mL | About 3 days after occasional use, but up to 30 days or more with heavy daily use | THC-COOH |
| COC | Cocaine | 150 ng/mL | 2-4 days after use, and up to about two weeks after heavy or repeated use | Benzoylecgonine (cocaine metabolite) |
| MOR also MOP also OPI | Opiates morphine and the opiates group | 300 ng/mL | 2-3 days after use | Codeine, Hydrocodone, Hydromorphone, Morphine, Oxymorphone |
| OXY | Oxycodone | 100 ng/mL | 2-4 days after the last dose | Noroxycodone, Oxycodone |
| MTD | Methadone | 300 ng/mL | 3-7 days, sometimes longer with regular dosing | EDDP (methadone metabolite), Methadone |
| BZO | Benzodiazepines | 200 ng/mL | 1-3 days after short-acting types, up to several weeks with long-acting drugs or regular use | 7-Aminoclonazepam, a-Hydroxyalprazolam, Alprazolam, Lorazepam, Nordiazepam, Oxazepam, Temazepam |
| BUP | Buprenorphine | 10 ng/mL | 3-7 days after the last dose | Buprenorphine, Norbuprenorphine |
| BAR | Barbiturates | 300 ng/mL | Short-acting types clear in 1-4 days; long-acting phenobarbital can be detectable for two to three weeks | Butalbital, Phenobarbital, Secobarbital |
| MDMA | MDMA (Ecstasy) methylenedioxymethamphetamine, sold as ecstasy or molly | 500 ng/mL | 2-4 days after use | MDA, MDMA |
| PCP | PCP phencyclidine | 25 ng/mL | About a week after occasional use, and considerably longer with heavy use | PCP |
| FEN also FYL | Fentanyl | 10 ng/mL | 1-3 days after use | Fentanyl, Norfentanyl |
| ETG | EtG (alcohol) ethyl glucuronide (usually written EtG), a metabolite of alcohol | 500 ng/mL | Up to about 80 hours (3-4 days) after heavy drinking, shorter after light drinking | Ethyl Sulfate (EtS), Ethyl Glucuronide (EtG) |
Each panel name links to its own page with the full detection window and prescription notes, or start at all 14 panels.
pH, OX and CR: the validity checks
Three more codes on the cassette are not drug panels at all. CR is creatinine, a normal component of urine that drops when a specimen is dilute. OX is oxidant, which picks up adulterants added to the cup. pH is acidity, which sits in a normal range for urine. Together they say whether the specimen is what it should be. A Testr collector also checks specimen temperature at the moment of collection.
Screen versus laboratory report
The cassette reports each code as positive or negative against its cutoff. A laboratory report looks different: it names the compound actually measured and gives a level. Cocaine, for example, is confirmed as benzoylecgonine, its main breakdown product; methadone as methadone and EDDP; cannabis as THC-COOH. With Rapid Test with Laboratory Confirmation, a CAP-accredited laboratory quantifies the specimen by LC-MS/MS across an 81-substance confirmation menu and reports measured levels in about 72 hours. Every laboratory report then goes to a Medical Review Officer (MRO), a physician who reviews laboratory-confirmed results and accounts for valid prescriptions before the report is released.
Confirmation can be chosen when you book, or added from the app within 2 hours of collection while the specimen is still viable. The At-Home Rapid Test and the Rapid Test with Laboratory Confirmation are the same 14-panel urine drug test at the door; the difference is whether the specimen goes on to the laboratory. How to read a Testr result explains negative, presumptive positive and laboratory-confirmed.
Codes on other cups that a Testr test does not carry
Cups sold for workplace, school or home use print panels the 14-panel cassette does not. If one of these appears on a cup or a report you are reading, this is what it stands for and whether the laboratory Testr uses can confirm it.
| Code | Stands for | On a Testr test |
|---|---|---|
| OPI300 / OPI2000 | opiates at a 300 or 2,000 ng/mL cutoff | Screened as MOR at 300 ng/mL |
| 6-MAM | 6-acetylmorphine, the metabolite specific to heroin | Not on the 14-panel screen; confirmed at the laboratory as 6-Acetylmorphine |
| TRA / TML | tramadol | Not on the 14-panel screen; confirmed at the laboratory as O-Desmethyl-cis-tramadol, Tramadol |
| KET | ketamine | Not on the 14-panel screen; confirmed at the laboratory as Ketamine, Norketamine |
| COT | cotinine, the nicotine metabolite | Not on the 14-panel screen; confirmed at the laboratory as Cotinine |
| K2 / SPICE | synthetic cannabinoids | Not on the 14-panel screen; four compounds are confirmed at the laboratory, see K2 and Spice |
| EDDP | the methadone metabolite | Screened as MTD; confirmed at the laboratory as methadone and EDDP |
| ALC | alcohol itself, on cups with an ethanol strip | Screened as ETG, the alcohol metabolite, which stays detectable far longer |
| TCA | tricyclic antidepressants | Not on the 14-panel screen or the laboratory menu |
| PPX | propoxyphene, a painkiller withdrawn in the United States in 2010 | Not on the 14-panel screen or the laboratory menu |
| MQL / MTQ | methaqualone | Not on the 14-panel screen or the laboratory menu |
| SG | specific gravity, a validity check for dilution | Not on the Testr cassette, which checks creatinine (CR) for dilution |
| NIT | nitrite, a validity check for adulterants | Not on the Testr cassette, which reads a general oxidant (OX) strip instead |
| GLUT | glutaraldehyde, a validity check for adulterants | Not on the Testr cassette, which reads a general oxidant (OX) strip instead |
Abbreviations on a drug test report
Beyond the panel codes, a report uses a second set of short forms for the process itself.
MRO: Medical Review Officer, a physician who reviews laboratory-confirmed results and accounts for valid prescriptions before the report is released.
LC-MS/MS: liquid chromatography with tandem mass spectrometry, the laboratory method that identifies each compound and measures its level.
GC/MS: gas chromatography mass spectrometry, an older confirmation method; the laboratory Testr uses confirms by LC-MS/MS.
EIA / immunoassay: the antibody-based method behind a rapid screen; it reads positive or negative against a cutoff and cannot measure a level.
ng/mL: nanograms per milliliter, the unit every cutoff and measured level is written in.
Cutoff: the level at or above which a panel reads positive; below it the panel reads negative even when a trace is present.
Presumptive positive: a screen read at or above the cutoff that has not been confirmed by the laboratory.
Non-DOT: testing outside the federal transportation rules; every Testr test is non-DOT.
CCF / chain of custody: the form and the record that track a specimen from collection to report; every Testr order carries a chain-of-custody code.
SVT: specimen validity testing: the creatinine, oxidant and pH checks, plus the temperature check at collection.
Negative dilute: a negative read on a specimen whose creatinine is low, which means the specimen was more water than usual.
5-panel, 10-panel, 14-panel: the number of drug panels on the cup; a Testr cassette carries 14.
Reading the codes
What do the abbreviations on a drug test mean?
Each code names one panel on the cassette: AMP amphetamine, MET (also mAMP) methamphetamine, THC cannabis, COC cocaine, MOR (also MOP or OPI) opiates, OXY oxycodone, MTD methadone, BZO benzodiazepines, BUP buprenorphine, BAR barbiturates, MDMA ecstasy, PCP phencyclidine, FEN (also FYL) fentanyl and ETG the alcohol metabolite. The table above gives the screening cutoff and typical detection window for each, and every panel name links to its own page.
What do pH, OX and CR mean on a drug test?
They are the specimen validity checks, not drug panels. CR is creatinine, read to tell whether a specimen is dilute; OX is oxidant, read for adulterants added to the cup; pH is acidity, which should sit in the normal range for urine. A Testr collector also checks specimen temperature at the moment of collection. A validity check that is out of range does not report a drug; it flags the specimen itself.
Do all drug test cups use the same abbreviations?
Mostly, with spelling differences. MOP, OPI and MOR all name the opiates panel; FYL and FEN both name fentanyl; mAMP and MET both name methamphetamine. What matters more is the cutoff printed beside the code, because two cups with the same code can read positive at different levels. The cutoffs in the table are the ones on a Testr screen.
What is MOP on a drug test?
MOP is the opiates panel: morphine, codeine and heroin, which the body turns into morphine. Many cups and laboratory reports print it as MOP or OPI; a Testr report prints the same panel as MOR, read at a 300 ng/mL cutoff. Some cups print OPI2000 instead, the same panel at a 2,000 ng/mL cutoff, so one specimen can read negative on one cup and positive on another.
What does AMP stand for on a drug test?
Amphetamine. The AMP panel screens for amphetamine and, through it, prescription stimulants such as Adderall and Dexedrine, at a 500 ng/mL cutoff on a Testr screen. Methamphetamine has its own panel, printed as MET or mAMP.
What does a positive next to an abbreviation mean?
That the specimen read at or above that panel's screening cutoff on the cassette. It is a screen, not a measured level. Laboratory confirmation is what produces a number: a CAP-accredited laboratory quantifies the specimen by LC-MS/MS, with results in about 72 hours, and every laboratory report is reviewed by a Medical Review Officer (MRO), a physician who reviews laboratory-confirmed results and accounts for valid prescriptions before the report is released. Confirmation can be added when you book, or from the app within 2 hours of collection, while the specimen is still viable.
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