DAVENPORT, Iowa (AP) — Iowa officials have been moving slowly to implement a law allowing for an extract of marijuana to be used for medical treatment, and advocates say they’ll keep pressing for more access to the drug. The Quad-City Times reports the state Department of Public Health has yet to issue a single marijuana use card that’s required under the law that passed last year.

Des Moines mom Maria La France says she remains too nervous about being arrested to regularly obtain marijuana oil for her son’s chronic epilepsy. So she’ll keep pressing for more access. Logan Edwards says the lack of access to medical marijuana in Iowa is why he left the state last year. The U.S. Marine from Davenport says he uses the drug to treat post-traumatic stress disorder.