Missouri Marijuana Compliance

According to Missouri law, both medical and recreational marijuana are legal. Adults who are 21-years-old or older can possess up to three ounces of cannabis flower for personal use, whereas medical patients are permitted up to six ounces. Despite these changes, Amendment 3 maintains restrictions on public smoking and allows fines for non-compliance.

Here are some common questions and answers regarding Missouri marijuana laws.

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This Information Is Not Intended for Legal Purposes

The information provided on this page is intended for your own knowledge, and should not be used for legal matters. Since marijuana testing regulations can vary, we advise you to seek the guidance of expert legal counsel when creating your company's substance abuse screening program.

Missouri Marijuana Compliance

Missouri Marijuana Laws

Overall Status: Fully Legal

Recreational marijuana is legal in Missouri, and medicinal marijuana is legal in for qualifying patients that meet certain medical conditions.

Medical Marijuana: Legal

Medicinal marijuana in Missouri is available to qualifying patients. To qualify for medical marijuana in the state, patients must be diagnosed with certain medical conditions, such as cancer, epilepsy, glaucoma, intractable migraines or a terminal illness.

Patients may purchase up to six ounces every 30 days. Medical marijuana may be purchased from Missouri-licensed dispensaries.

Decriminalized: Yes

Missouri has not fully decriminalized marijuana but has decriminalized it to a certain degree. Although marijuana is not legal in the state, the first-time possession of marijuana in a small amount does not result in prison time and is rather treated like a minor traffic violation.

Recreational Marijuana: Legal

Beginning on December 8, 2022, residents of Missouri were legally allowed to possess up to 3 ounces of marijuana for personal use. Missouri became the 21st state to legalize the recreational use of marijuana.

Last updated 1/15/2024

Frequently Asked Questions

Yes, both medical and recreational marijuana are legal in Missouri.

Are there any unique laws about marijuana in Missouri?

Yes, while marijuana is legal, Amendment 3 restricts public smoking and imposes fines for non-compliance. Additionally, adults 21 and older can possess up to three ounces for personal use, and medical patients up to six ounces.

Marijuana state vs. federal laws are not always the same. Marijuana is considered a Schedule 1 drug and remains illegal under federal law. However, some states have legalized marijuana for recreational and medical purposes.

What is Missouri's history with marijuana?

On November 6, 2018, Missouri passed the Medical Marijuana and Veteran Healthcare Services Initiative, legalizing medicinal marijuana for patients who qualify. Recreational marijuana use was legalized on December 8, 2022, making Missouri the 21st state to do so.

Drug Panels That Exclude Marijuana

Urine Drug Panels That Exclude Marijuana Testing

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Drug Panels That Include Marijuana

Urine Drug Panels That Include Marijuana Testing

Many of our testing options include marijuana testing. Below are some of the most popular urine drug tests including marijuana:

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A comprehensive list of the hair drug tests that we offer can be found here.


"Missouri Laws and Penalties." NORML, https://norml.org/laws/missouri-penalties-2/
"Missouri Medical Marijuana Law." NORML, https://norml.org/laws/medical-laws/missouri-medical-marijuana-law/
Hagan, John C. III. "No Legal Recreational Marijuana in Missouri: We Have Enough Problems with Addiction!" Mo Med, Seot-Oct 2020, https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7723140/
"Missouri Goes Green: What Employers Need to Know About the State's New Medical Marijuana Law." Ogletree Deakins, 27 November 2018, https://ogletree.com/insights/missouri-goes-green-what-employers-need-to-know-about-the-states-new-medical-marijuana-law/
"Medical Marijuana – General FAQs." Missouri Department of Health & Senior Services, https://health.mo.gov/safety/medical-marijuana/faqs-general.php
"Qualifying Medical Conditions." Missouri Department of Health & Senior Services, https://health.mo.gov/safety/medical-marijuana/how-to-apply.php#patientinfo
"New 2022 campaign aims to place adult-use legalization proposal on the ballot." Marijuana Policy Project, https://www.mpp.org/states/missouri/
Perryman, N. F. (2022, December 6). What Missouri employers need to know about marijuana legalization. Lewis Rice LLC. https://www.lewisrice.com/publications/what-missouri-employers-need-to-know-about-marijuana-legalization/
Adult use faqs. Adult Use FAQs | Medical Marijuana | Health Services Regulation | Health & Senior Services. (n.d.). https://health.mo.gov/safety/cannabis/faqs-adultuse.php