Designer Stimulant Laboratory Testing
Cutoffs and Methods

The following is an explanation of RTL's designer stimulant confirmation procedures/cutoff levels. The cutoff levels listed below may periodically change.

P80 Expanded Designer Stimulant Panel
Drug Screening Panel Methodology Cutoff Level
BZP
(Benzylpiperazine)
GC/MS 25 ng/mL
Butylone
(β-keto-N-methylbenzodioxolylpropylamine, bk-MBDB)
GC/MS 25 ng/mL
Buphedrone
(2-[methylamino]-1-phenylbutan-1-one)
GC/MS Qualitative
Cathinone
(Khat or Benzoylethanamine)
GC/MS 25 ng/mL
Ethylone
(3,4-methylenedioxy-N-ethylcathinone, MDEC, bk-MDEA)
GC/MS 25 ng/mL
Eutylone
([±]-1-[1,3-benzodioxol-5-yl]-2-[ethylamino]butan-1-one)
GC/MS 25 ng/mL
Flephedrone
([RS]-1-[4-fluorophenyl]-2-methylaminopropan-1-one)
GC/MS Qualitative
MBDB
(Methylbenzodioxolylbutanamine, Methyl-J, "Eden")
GC/MS 50 ng/mL
mCPP
(meta-Chlorophenylpiperazine)
GC/MS 25 ng/mL
MDA
(3,4-Methylenedioxyamphetamine, tenamfetamine)
GC/MS 50 ng/mL
MDEA
(3,4-Methylenedioxy-N-ethylamphetamine, MDEA, MDE, "Eve")
GC/MS 50 ng/mL
MDMA
(3,4-Methylenedioxymethamphetamine, ecstasy, "E", "X")
GC/MS 50 ng/mL
MDPV
(Methylenedioxypyrovalerone, Cloud 9, Ivory Wave, White Lightning)
GC/MS 25 ng/mL
Mephedrone
(4-methylmethcathinone [4-MMC], 4-methylephedrone, "Meph", "MCat")
GC/MS 25 ng/mL
Methcathinone
(α-methylamino-propiophenone, may be confused with mephedrone)
GC/MS 25 ng/mL
4-Methylethcathinone
([RS]-2-ethylamino-1-[4-methylphenyl]propan-1-one, "4-MEC")
GC/MS Qualitative
Methylone
(3,4-methylenedioxy-N-methylcathinone, bk-MDMA, MDMC, "M1")
GC/MS 25 ng/mL
Pentedrone
([±]-1-phenyl-2-[methylamino]pentan-1-one)
GC/MS Qualitative
Pentylone
([±]-1-[1,3-benzodioxol-5-yl]-2-[methylamino]pentan-1-one)
GC/MS 25 ng/mL
α-pyrrolidinopentiophenone
([RS]-1-phenyl-2-[1-pyrrolidinyl]-1-pentanone, PVP)
GC/MS 25 ng/mL
TFMPP
(3-Trifluoromethylphenylpiperazine, "Legal X")
GC/MS 25 ng/mL

RTL screens urine specimens by gas chromatography/mass spectrometry (GC/MS). Presumptive positive specimens will be confirmed using a second aliquot prior to reporting positive results. RTL confirms urine specimens by GC/MS. The analytical methods used by RTL are scientifically accepted. Cutoff levels updated periodically.


The Resource Library includes information available in our printed Reference Guide, delivered to all new clients. To download a PDF of our Reference Guide, click here.