Over 99% accurate (clinically studies confirmed that over 99% of those individuals with drugs present in their urine tested positive with the First Check test. We recommend all preliminary positive screening results be sent to the laboratory for free confidential confirmatory testing. Gas chromatography/mass spectrometry (GC/MS) is the gold standard in laboratory testing for most drugs. Confidential confirmatory testing is included in the purchase price of the First Check Home Drug Test). Results in 5 minutes. Contents: 1 First Check drug test lid; 1 cup for sample collection; 1 instruction insert; 1 pre-addressed mailing box; 1 confirmation identification label; 1 plastic transportation bag; confidential confirmatory test included in purchase price. First Check offers a variety or home drug testing solutions, providing results in just 5 minutes for the possible use of marijuana, cocaine, methamphetamine and opiates. Drug: Marijuana; identifier - THC; street names - pot, grass, weed, dank, ganja, bud, hydro, zig zag. Drug: Cocaine; identifier - COC; street names - coke, racehorse, charlie, yeyo, blow, nose nachos, hooter, crank. Drug: Methamphetamine; identifier - MET; street names - crystal, speedballs, crank, speed, glass. Drug: Opiates; identifier - OPI; street names - gun powder, morphine, smack, H, courage pills, horse, bomb, heroin. For in vitro diagnostic use. Made in USA.