Landmark Cannabis Employment Law Cases
A handful of court decisions have shaped the cannabis workplace landscape more than any other factor. This page covers the cases every employment attorney in the cannabis space knows by name, and why each one matters.
Pro-Employee Decisions
Noffsinger v. SSC Niantic Operating Company, LLC
United States District Court, District of Connecticut, 2017
Katelin Noffsinger was offered a position at SSC Niantic, a nursing home. Her pre-employment drug test showed positive for cannabis — from her state-legal medical use. The offer was rescinded. Noffsinger sued under Connecticut's medical cannabis employment protection statute.
SSC argued that the federal Drug-Free Workplace Act, Controlled Substances Act, and ADA preempted state law. The federal court disagreed:
- The DFWA "neither requires drug testing nor regulates an employee's off-duty cannabis use"
- The Controlled Substances Act does not preempt state employment protections
- The ADA's drug exclusion does not bar state-law protection
Why it matters: Noffsinger was the first federal court decision directly addressing whether federal drug laws override state medical cannabis employment protections. The answer was no, and the decision has been cited in similar cases across the country.
Callaghan v. Darlington Fabrics Corp.
Rhode Island Superior Court, 2017
Christine Callaghan applied for an internship at Darlington Fabrics through her university. The offer was rescinded after she disclosed her medical cannabis card. Rhode Island's Hawkins-Slater Act (R.I. Gen. Laws § 21-28.6-4) prohibited employment discrimination against medical cannabis cardholders, but had never been tested in court.
The court ruled for Callaghan, holding:
- "Status as cardholder" includes actual medical cannabis use
- The statute creates an implied private right of action
- Federal law does not preempt the state protection
Why it matters: First state court decision finding implied private right of action under a medical cannabis employment protection statute. Opened the door for private lawsuits in multiple states.
Barbuto v. Advantage Sales and Marketing, LLC
Massachusetts Supreme Judicial Court, 2017 (477 Mass. 456)
Cristina Barbuto was hired by Advantage Sales and subsequently terminated after a positive drug test from her state-legal medical cannabis use for Crohn's disease. Massachusetts had no explicit cannabis employment statute, but Barbuto sued under the state disability discrimination law (M.G.L. ch. 151B).
The Massachusetts Supreme Judicial Court ruled for Barbuto:
- Medical cannabis use for a qualifying medical condition can be a reasonable accommodation
- Employers must engage in the interactive accommodation process
- Accommodation is not automatic, but termination without the interactive process is discriminatory
Why it matters: First state supreme court decision requiring employers to engage in the disability-law accommodation process for medical cannabis patients. Influential far beyond Massachusetts.
Whitmire v. Wal-Mart Stores, Inc.
United States District Court, District of Arizona
Carol Whitmire was terminated from Wal-Mart after a positive drug test based on her state-legal medical cannabis use. Arizona's Medical Marijuana Act (AMMA) prohibits discrimination based on cardholder status.
The court ruled that Wal-Mart violated the AMMA. Critically, the court held that a positive drug test alone is insufficient to establish impairment at work. The employer would need independent expert evidence of actual impairment during working hours.
Why it matters: Established the principle that metabolite testing does not prove impairment. This logic is now embedded in several state statutes (California AB 2188, New Jersey CREAMMA).
Palmiter v. Commonwealth Health Systems, Inc.
Pennsylvania Superior Court, 2021
Pamela Palmiter was terminated from her medical assistant job after a positive drug test from her state-legal medical cannabis use. The Pennsylvania Medical Marijuana Act includes employment protection language.
The Pennsylvania Superior Court recognized a private right of action under the statute, allowing Palmiter to sue for damages.
Why it matters: Continued the pattern of state courts recognizing private enforcement rights under medical cannabis employment statutes.
Pro-Employer Decisions
Coats v. Dish Network, LLC
Colorado Supreme Court, 2015 (350 P.3d 849)
Brandon Coats was a quadriplegic and a state-registered medical cannabis patient. He was terminated from Dish Network after a positive drug test. Coats sued under Colorado's Lawful Off-Duty Activities statute (C.R.S. § 24-34-402.5), which protects employees from adverse action for lawful off-duty conduct.
The Colorado Supreme Court unanimously ruled against Coats, holding that "lawful activity" under the statute means activity that is lawful under both state and federal law. Because cannabis remains federally illegal, it is not "lawful activity" for statutory purposes.
Why it matters: Despite Colorado being an early recreational legalizer, workers have no employment protection — and the logic applies to every other state with similar "lawful activity" language. This is the case most often cited by employers opposing cannabis employment claims.
Emerald Steel Fabricators v. Bureau of Labor and Industries
Oregon Supreme Court, 2010 (348 Or. 159)
An Oregon medical cannabis patient requested accommodation from his employer. The employer refused, and the patient brought a claim under Oregon's disability accommodation statute.
The Oregon Supreme Court ruled for the employer, holding that federal Controlled Substances Act preemption barred Oregon from requiring accommodation of federally illegal drug use.
Why it matters: The earliest major state supreme court decision holding that federal preemption defeats state medical cannabis accommodation claims. Preserved employer authority in Oregon despite legalization.
Ceballos v. NP Palace, LLC
Nevada Supreme Court, 2022
Danny Ceballos, a Nevada casino employee, was terminated after a positive drug test from his recreational cannabis use. Cannabis was legal recreationally in Nevada. Ceballos sued under NRS 613.333, Nevada's lawful off-duty conduct statute.
The Nevada Supreme Court ruled against Ceballos. The court held that "lawful off-duty conduct" requires legality under both state and federal law — the same logic as Coats. Because cannabis remains federally illegal, recreational use is not protected by the statute.
Why it matters: Applied the Coats logic to Nevada, confirming that current-employee recreational cannabis protection is largely absent even in recreational states unless explicit statutory protection exists.
Ross v. RagingWire Telecommunications, Inc.
California Supreme Court, 2008
Gary Ross was a medical cannabis patient terminated from RagingWire after a positive drug test. Ross sued under California's Fair Employment and Housing Act and the Compassionate Use Act.
The California Supreme Court ruled against Ross, holding that the Compassionate Use Act provides a criminal defense only — it does not create employment protection.
Why it matters: For 16 years, Ross defined the limits of cannabis employment protection in California. It was finally superseded by AB 2188 (effective January 1, 2024), which explicitly provides the employment protection that Ross had denied. This is a rare example of legislation effectively overturning a state supreme court decision.
The Pattern
The case law shows a clear evolution:
- 2008–2015: Courts ruled against employees (Ross, Emerald Steel, Coats)
- 2017: Turning point with Noffsinger, Callaghan, Barbuto — courts began finding for employees under specific medical cannabis statutes
- 2018–2025: State legislatures passed explicit employment protection statutes (CREAMMA, AB 2188, SB 5123, DATWA, MRTA) to provide the protection that courts had been willing to recognize
- 2025–present: Focus on impairment-based testing and narrow exceptions
The arc bends toward employee protection, but slowly and state-by-state. Federal contractor and safety-sensitive carve-outs remain durable in every jurisdiction.