In Illinois, the landscape surrounding cannabis is changing. The state launched its medical marijuana program three years ago, and for most of that time patients had to have one of about 40 conditions, such as cancer or AIDS, to qualify. Chronic pain was not included. But this summer, Gov. Bruce Rauner signed legislation that allows people prescribed opioids to use medical marijuana, a change that is expected to take full effect early next year. Even before Rauner signed the law, Illinois growers began to expand as more patients gained access to weed. There are currently more than 48,000 qualified patients, nearly double the number from a year ago.