Drug Testing Issue | Status | Comments |
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Instant or POCT Testing | Restricted | Use lab testing for post-accident in order to use the intoxication defense. Confirm all non-negative results at the lab. |
Drug Panels | No Restrictions | |
Laboratory | No Restrictions | SAMHSA certified highly recommended to avoid exposure to liability. |
Medical Review Officer | Not Required | Highly recommended to use an MRO for all workplace drug tests. |
Random Testing | No Restrictions | |
Post-Accident | No Restrictions | Drug testing policies should limit post-incident testing to situations in which employee drug use cannot be ruled out as potentially contributing to the incident. |
Reasonable Suspicion | No Restrictions | |
Oral Fluids | No Restrictions | |
Hair Testing | No Restrictions | |
Unemployment Denial | Yes | |
Workers Comp Discount | No | |
Intoxication Defense | Yes | The law provides for a rebuttable presumption of intoxication and that the injury was proximately caused by that intoxication if certain conditions are met. |
Medical Marijuana | Yes | November 6, 2018 - With approximately 61% of voters supporting Amendment 2, Missourians with one of 9 qualifying conditions (those without a qualifying condition can gain approval from a doctor for a medical marijuana card) will have access to purchase and/or grow medical marijuana. Employers are likely to retain the majority of their rights around marijuana pertaining to drug testing and disciplinary action, and Amendment 2 included language that protects employers from adverse action by medical marijuana-using employees. |
Recreational Marijuana | Yes | Employers may still maintain drug-free workplace rules, and they may discipline or terminate employees for using, possessing, or being under the influence of marijuana while at work. Use caution when making hiring, discipline, and termination decisions when marijuana use may be off duty and lawful. |
Report Driver DOT Positives | No | |
General Statute | -- | While Missouri does not have a drug testing statute, employers must meet certain drug testing requirements in order to challenge workers' and unemployment comp claims. |