It can almost certainly ease chronic pain and might help some people sleep, but it may also raise the risk of getting schizophrenia and trigger heart attacks.
Those are among the conclusions about marijuana reached by a federal advisory panel in a report released Thursday.
The experts also called for a national effort to learn more about marijuana and its chemical cousins, including similarly acting compounds called cannabinoids.
The current lack of scientific information "poses a public health risk," said the report , from the National Academies of Sciences, Engineering and Medicine. Patients, health care professionals and policy makers need more evidence...