Regardless of the size of your company, Twin Lakes Drug Testing can help you enforce a drug free workplace. We offer testing for pre-employment, random selections, post accident, follow up, return to duty, and reasonable suspicion/cause. Establishing a drug free workplace ensures a safe, professional environment for all employees and can be a cost - effective investment that will save you time and money in the end. ​Which is the best one for my company? We offer a 5, 7, and 11 panel urine drug screen and they test for the following: 5 panel - Amphetamines, Marijuana, PCP, Cocaine, and Opiates. 7 Panel - Amphetamines, Marijuana, PCP, Cocaine, Codeine/Morphine, Oxycodone/Oxymorphone, and Hyrdocodone/Hydromorphone. ​11 Panel - Amphetamines, Marijuana, PCP, Cocaine, Opiates, Methaqualone, Benzodiazepines, Methadone, Propoxyphene, Barbiturates, and Expanded Opiates.