A medical group of epilepsy experts is calling on the federal government to reconsider classifying marijuana as a dangerous drug so its impact on seizures can be studied.

The American Epilepsy Society issued its statement on Monday. It notes that there have been several reported cases of pot treating seizures but not enough scientific study has been performed to show whether the drug works and is safe.

That research is hard to perform while marijuana is classified as a Schedule 1 substance by the federal government.

The statement also backs off a previous warning that patients not use marijuana. Now the society advises careful consultation with epilepsy specialists in all treatments.