Texas cannabis history
Reviewed
The Department of Public Safety says the Compassionate Use Act, Senate Bill 339, was enacted in the 2015 regular session. Current law defines low-THC cannabis as not more than 10 milligrams of tetrahydrocannabinols in each dosage unit, effective September 1, 2025. Health and Safety Code section 481.121 still makes unauthorized possession of a usable quantity of marijuana an offense.
This is a short history, not legal advice. The rules that apply today are on the Texas cannabis laws page. A date is included only when the linked page states it.
At a glance
2015The department names Senate Bill 339 and the 84th Legislature. It does not give the day the bill was signed.
September 1, 2025Medical use in chapter 169 means ingestion by a means other than smoking of a prescribed amount of low-THC cannabis.
Current criminal statuteThe offense is knowing or intentional possession of a usable quantity of marijuana except as authorized by that chapter.
The Compassionate Use Program
- The department page is the enactment year. The dosage definition’s effective date is on the Occupations Code page, not on the department’s year line.
Sources
- Senate Bill 339
- 10 milligrams of tetrahydrocannabinols in each dosage unit, effective September 1, 2025
- except as authorized by that chapter
Citations were checked against the linked pages on October 24, 2026. Claims without a statute, election result, regulator page, court opinion, or news report were left out.