Pennsylvania cannabis employment and drug testing law
Medical patients only. Employers may not discriminate solely because someone is certified to use medical marijuana, but need not accommodate on-site use and may discipline impairment. Status: Medical patients only — Protections reach registered or certified medical cannabis patients, not adult-use consumers.
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Key Takeaways
- Status: Medical patients only — Protections reach registered or certified medical cannabis patients, not adult-use consumers.
- Main source: 35 P.S. § 10231.2103(b).
- Federal testing rules (DOT and federal workplace programs) apply regardless of state law.
What the law protects
- Section 2103(b)(1) of the Medical Marijuana Act says no employer may discharge, threaten, refuse to hire, or otherwise discriminate or retaliate against an employee regarding compensation, terms, conditions, location, or privileges solely on the basis of the employee’s status as an individual certified to use medical marijuana.
Exceptions and limits
- Employers need not accommodate use of medical marijuana on the property or premises of any place of employment.
- Employers may discipline an employee for being under the influence of medical marijuana in the workplace, or for working while under the influence when the employee’s conduct falls below the standard of care normally accepted for that position.
- Employers are not required to do anything that would violate federal law.
Drug testing rules
- This section does not address testing procedures; other parts of the act may limit specific duties, so check the full act for job-specific rules.
Federal law and testing
Federal rules still apply. Under the U.S. DOT’s testing rules, a Medical Review Officer must not verify a test as negative because a physician recommended a Schedule I drug under a state “medical marijuana” law, and must not accept use of hemp or other non-prescription marijuana-related products as an explanation (49 CFR § 40.151(e)–(f)). That covers safety-sensitive transportation workers regardless of state law.
Federal workplace drug testing programs follow HHS Mandatory Guidelines, which set the cannabis testing panel and cutoffs for urine and oral fluid (Federal Register, March 13, 2026). Most state protections above include an exception where federal law, a federal contract, or federal funding requires otherwise.
For how long cannabis can show up on each test type, see our drug testing guide and the detection window explainer.
Common questions
Can you be fired for using cannabis in Pennsylvania?
Pennsylvania’s protection (35 P.S. § 10231.2103(b)) is written for medical cannabis patients. It does not cover adult-use consumers, and employers can still act on use, possession, or impairment at work, plus the other exceptions listed in the statute.
Can Pennsylvania employers still drug test for THC?
Yes. 35 P.S. § 10231.2103(b) does not ban drug testing; it shapes what an employer may do with the results. Federally required tests, such as DOT-regulated jobs, are unaffected by state law.
Does Pennsylvania law protect CDL drivers or federal workers?
No state law overrides federal testing rules. DOT-regulated employees remain subject to federal cannabis testing, and a state medical recommendation is not an accepted explanation for a positive result.
Sources
- government Pennsylvania Medical Marijuana Act, Act 16 of 2016, § 2103 (35 P.S. § 10231.2103) (Pennsylvania General Assembly) ↗ accessed 2026-10-03
- government eCFR, 49 CFR § 40.151 — What are MROs prohibited from doing as part of the verification process? (U.S. DOT) ↗ accessed 2026-10-03
- government Federal Register, Mandatory Guidelines for Federal Workplace Drug Testing Programs: Authorized Testing Panels (March 13, 2026) ↗ accessed 2026-10-03