Shirley Avedon, 90, had never been a cannabis user. But carpal tunnel syndrome that sends shooting pains into both of her hands and an aversion to conventional steroid and surgical treatments is prompting her to consider some new options. "It's very painful, sometimes I can't even open my hand," Avedon says. So for the second time in two months, she's climbed on board a bus that provides seniors at the Laguna Woods Village retirement community in Orange County, Calif., with a free shuttle to a nearby marijuana dispensary.