ST. PAUL, Minn. -

Minnesota is adding post-traumatic stress disorder as a condition that qualifies for medical marijuana under the state program.

PTSD was one of nine conditions that citizens had asked the Department of Health to consider adding to the program, and the only one to make the cut.

Commissioner Ed Ehlinger said supporters of PTSD made the strongest case, even though he said there was a lack of published scientific evidence that medical marijuana works.

The department also decided Thursday to let manufacturers make topical formulations to apply medical marijuana in such form as patches, lotions and creams.

Minnesota lawmakers passed one of the strictest medical marijuana laws in the country in 2014. Before Thursday, only 10 conditions qualified for the program and using the plant form is banned.

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More changes may be coming to Minnesota's medical marijuana program.

The Minnesota's Department of Health was expected to announce Thursday whether it would expand the program to people suffering post-traumatic stress disorder, autism, arthritis and others. The health commissioner is reviewing public petitions for nine potential new conditions total.

The possible expansion comes a year after Commissioner Ed Ehlinger decided to add intractable pain as a qualifying condition. That addition drastically increased the patient pool in the struggling program.

Minnesota lawmakers passed one of the strictest medical marijuana laws in the country in 2014. Just 10 conditions currently qualify for the program and using the plant form is banned.

Other petitions up for review Thursday would allow patients to use the plant, vaporize it or eat edible marijuana products.