Prevent drug abuse at home with this effective anti-drug tool. Our laboratory uses the latest technology with state of the art equipment. Gas Chromatography Mass Spectrometry is conducted on all positive results. Results indicate a positive or negative result for each drug class. In addition, an assessment of the hair dose response is provided to identify whether the user is a low , medium , or high user excluding marijuana . Tests for: Marijuana. Amphetamines. Methamphetamines. Opiates. Ecstasy. Cocaine. Phencyclidine Private & confidential: No personal information is required, inste.