Used to be a primary ingredient in old fashioned root beer in conjunction with sassafras which was more widely available prior to studies of the potential health risks of sassafras. Extracts from the sarsaparilla plant are still sold for medicinal purposes, and the roots can be purchased in certain grocery or health food stores. The beverage called sarsaparilla can be a little more difficult to find. Smaller bottling companies may produce a version for local consumption, but the national interest in sarsaparilla's cousin root beer has shrunk considerably. The chances of bellying up to the bar and demanding a sasparilly are rather small these days, sad to say.