 [ Symptoms ] how long does it take for food to pass through the stomach and small intestine to the large intestine [ Disease ] this is a great question luckily medicare provides a great web site for folks to check out what is covered and what is not covered in its list of medications or formulary check out www medicare gov and click formulary finder 2010 plan data and then select your state of residence in the drop down menu then type in the medication you wish to learn about