SUMMARY: Fifty-five percent of voters approved Measure 67 on November 3, 1998. The law took effect on December 3, 1998. It removes state-level criminal penalties on the use, possession and cultivation of marijuana by patients who possess a signed recommendation from their physician stating that marijuana “may mitigate” his or her debilitating symptoms. Patients diagnosed with the following illnesses are afforded legal protection under this act: cachexiacancerchronic painepilepsy and other disorders characterized by seizures; glaucomaHIV or AIDSmultiple sclerosis and other disorders characterized by muscle spasticity; and nausea. Other conditions are subject to approval by the Health Division of the Oregon Department of Human Resources. Patients (or their primary caregivers) may legally possess no more than three ounces of usable marijuana, and may cultivate no more than seven marijuana plants, of which no more than three may be mature. The law establishes a confidential state-run patient registry that issues identification cards to qualifying patients. Patients who do not join the registry or possess greater amounts of marijuana than allowed by law may argue the “affirmative defense of medical necessity” if they are arrested on marijuana charges.

The Oregon law does not include a reciprocity provision. However, the Oregon Court of Appeals has ruled (and the Oregon Medical Marijuana Program has confirmed) that patients from out of state are permitted to register with the Oregon Medical Marijuana Program to obtain a registry identification card, the same as an Oregon resident, which will protect them from arrest or prosecution while in Oregon. These out of state patients are required to obtain a recommendation for the medical use of marijuana from an Oregon licensed physician. State v. Berringer, 229 P3d 615 (2010).


House Bill 3052, which took effect on July 21, 1999, mandates that patients (or their caregivers) may only cultivate marijuana in one location, and requires that patients must be diagnosed by their physicians at least 12 months prior to an arrest in order to present an “affirmative defense.” This bill also states that law enforcement officials who seize marijuana from a patient pending trial do not have to keep those plants alive. Last year the Oregon Board of Health approved agitation due to Alzheimer’s disease to the list of debilitating conditions qualifying for legal protection.

In August 2001, program administrators filed established temporary procedures further defining the relationship between physicians and patients. The new rule defines attending physician as “a physician who has established a physician/patient relationship with the patient; … is primarily responsible for the care and treatment of the patients; … has reviewed a patient’s medical records at the patient’s request, has conducted a thorough physical examination of the patient, has provided a treatment plan and/or follow-up care, and has documented these activities in a patient file.”

Also, Senate Bill 1085, which took effect on January 1, 2006, raises the quantity of cannabis that authorized patients may possess from seven plants (with no more than three mature) and three ounces of cannabis to six mature cannabis plants, 18 immature seedlings, and 24 ounces of usable cannabis. However, those state-qualified patients who possess cannabis in amounts exceeding the new state guidelines will no longer retain the ability to argue an “affirmative defense” of medical necessity at trial. Patients who fail to register with the state, but who possess medical cannabis in amounts compliant with state law, still retain the ability to raise an “affirmative defense” at trial.

Other amendments to Oregon’s medical marijuana law redefine “mature plants” to include only those cannabis plants that are more than 12 inches in height and diameter, and establish a state-registry for those authorized to produce medical cannabis to qualified patients.

MEDICAL MARIJUANA STATUTES:Oregon Medical Marijuana Act, Or. Rev. Stat. § 475.300 (2007).

CAREGIVERS: Yes. Designated primary caregiver is the person that has significant responsibility for managing the well-being of a person who has been diagnosed with a debilitating medical condition. Primary caregiver does not include the patient’s physician. The caregiver must be 18 years of age or older. A patient may only have one primary caregiver. Or. Rev. Stat. §§ 475.302(5); 475.312(2) (2007).

CONTACT INFORMATION: Application information for the Oregon medical marijuana registry is available online or by writing:

Oregon Department of Human Services
800 NE Oregon St.
Portland, OR 97232
(503) 731-4000

Oregon Cannabis Patients registry:             1 (877) 600-6767

Oregon NORML Medical Marijuana Act Handbook (PDF)