Oklahoma State Question 788, the Medical Marijuana Legalization Initiative, was on the ballot in Oklahoma as an initiated state statute on June 26, 2018. Oklahoma voters approved a ballot measure making the state the 30th in the U.S. to legalize medical cannabis.

People with licenses will be permitted to possess up to 3 ounces of marijuana on their person and 8 ounces of marijuana in their residence. In addition patients could have up to six seedling plants and six additional mature plants, one ounce of cannabis concentrates, and up to 72 ounces of edible cannabis products.

A 7 percent tax would be levied on cannabis sales, with revenue being allocated to administrative costs, education, and drug and alcohol rehabilitation. The state will issue licenses for medical cannabis cultivation, processing, transportation and dispensing businesses.

As of January 25, 2019, according to OMMA information, more than 2,200 cannabis business licenses had been approved, including over 300 processors, more than 1,260 growers and almost 900 dispensaries, with an approved patient pool of more than 18,600.

According to the Marijuana Business Factbook 2018, annual retail sales in Oklahoma are expected to reach $150 million-$250 million to 2023.