A patient is not an impaired driver.
Pennsylvania can charge a medical cannabis patient with DUI because of what a blood test finds, not because of how they were driving. Metabolites stay detectable for days or weeks after the last dose. A patient who is stone-cold sober at the wheel can still be convicted at the state's highest DUI tier.
75 Pa.C.S. § 3802(d)(2) — actual impairment
Driving while impaired by a drug to a degree that makes you unsafe. Proof of impairment required.
Stays exactly as it is75 Pa.C.S. § 3802(d)(1) — presence alone
Driving with any amount of a Schedule I substance or its metabolite in your blood. No impairment has to be shown. A certification is not a defense.
This is the part that traps patientsGreen Bridge Society does not want impaired drivers on the road, and neither does the bill. HB 878 leaves the impairment offense untouched. It only stops treating the residue of a legal medicine as proof of a crime.
Find the lawmakers who represent you
Bills move when members hear from people in their own district. Enter your Pennsylvania address and we'll show you your state representative and state senator, along with a message you can send in about two minutes.
Your address is used to match a district and is not stored.
Why this keeps happening
Cannabis was rescheduled federally. It does not protect you at a traffic stop.
On April 23, 2026 the federal government moved marijuana held under a state medical marijuana license from Schedule I to Schedule III of the federal Controlled Substances Act. Pennsylvania's DUI statute does not refer to the federal schedule. It refers to Pennsylvania's own Controlled Substance, Drug, Device and Cosmetic Act, where marijuana is still Schedule I. Nothing about your exposure under \u00a7 3802(d)(1) changed. Drive as though the law is exactly what it was last year, because it is.
Pennsylvania legalized medical cannabis in 2016 and never updated the vehicle code to match. Courts have since confirmed that medical cannabis is still treated as a Schedule I substance for DUI purposes, so holding a card is not a defense. A marijuana DUI is prosecuted in the same tier as a .16 BAC alcohol DUI — the most serious tier on the books — with automatic license suspension on conviction.
The practical result is that hundreds of thousands of Pennsylvanians who followed every rule their physician gave them cannot drive to work with certainty, no matter how long they wait after their last dose.
Where the fix stands: House Bill 878 (2025–26 session) would correct this. It was introduced in March 2025 and referred to the House Transportation Committee, where it has not received a vote. Check the bill's current status on the General Assembly's official page.
Why the calendar matters: Pennsylvania's two-year legislative session ends November 30, 2026. Any bill that has not passed by then dies and has to start over from introduction in the next session.
Two objections, answered
“There's no reliable roadside test for cannabis impairment.” Pennsylvania already prosecutes cannabis impairment under \u00a7 3802(d)(2), using field sobriety testing and Drug Recognition Experts, every day. The tools exist and the Commonwealth already uses them. The presence-only offense isn't filling a gap in the law — it's a shortcut around having to prove the case.
“Any amount in your blood is still a risk.” Nobody is charged on Tuesday for the beer they drank Saturday, because the law measures the alcohol that is still doing something. THC metabolites are what's left after the body has finished with the medicine. Charging on metabolites is charging for the wrapper, not the dose.
Tell us what this law has cost you
Lawmakers move on stories more than on statistics. If Pennsylvania's cannabis DUI law has affected you, someone in your family, or your ability to work, we'd like to hear it.
Please don't send details of a case that is still open — talk to your attorney first. This form is not legal advice and does not create an attorney–client or patient relationship. Stories are kept separate from patient records.
There is a second door, and it isn't the legislature
The Department of Health runs Pennsylvania's medical marijuana program. It approves the practitioners, certifies the patients and issues the cards. It also has statutory authority, under section 3(c) of the Controlled Substance, Drug, Device and Cosmetic Act, to reschedule a substance to coincide with federal law — and a move to a lower schedule takes effect as soon as it is published in the Pennsylvania Bulletin.
That isn't theoretical. The Department used exactly that authority in 2018, after the DEA rescheduled the FDA-approved CBD formulation, moving it out of Pennsylvania's Schedule I.
Be clear about what this would and wouldn't do. Moving medical marijuana to Pennsylvania Schedule III would not by itself end the DUI problem, because \u00a7 3802(d)(1)(ii) still reaches a Schedule III substance that has not been “medically prescribed,” and cannabis is certified rather than prescribed. The statutory fix is still needed. But an agency that certifies patients while its own schedule says the medicine has no accepted medical use is holding two positions at once, and only one of them can be right.
Write the Department of Health
Different recipient, different argument. Send this one whether or not you sent the message to your lawmakers.
Office of Medical Marijuana, Department of Health, Room 628, Health and Welfare Building, 625 Forster Street, Harrisburg, PA 17120 \u00b7 (717) 547-3047
Pass it on
One message from one district is easy to ignore. A few hundred from across the state is not. Share this page with anyone in Pennsylvania who carries a card.
Questions people ask
Does this bill make it legal to drive high?
No. Driving while actually impaired stays illegal under § 3802(d)(2), with the same penalties. The change is to the presence-only offense, which can convict a person who was not impaired at all.
Cannabis is Schedule III now. Doesn't that protect me?
No. The April 2026 federal order changed the federal schedule. Pennsylvania's DUI statute points at Pennsylvania's own drug schedule, where marijuana is still Schedule I, and only the Department of Health or the General Assembly can change that. Assume you are in exactly the same position you were in before the federal order.
How long does THC stay detectable?
It depends on the person, the dose and the test. Metabolites are commonly detectable for days after a single use and for weeks in regular users — long after any effect has worn off. There is no waiting period that makes a patient reliably safe from a presence-only charge.
I already have a charge. Can you help?
We can't give legal advice or act on an open case. Talk to a Pennsylvania DUI attorney. What you can do here is contact your lawmakers, which is about the future of the law rather than your case.
Do I have to be a Green Bridge patient?
No. This page is open to any Pennsylvania resident and asks nothing about where you were certified.
Will you send the message for me?
No — you send it yourself, from your own email or phone. Messages that come from a constituent's own address get read; bulk-delivered identical messages usually don't.