Medicine Overview of Exium Mups 20mg Tablet Introduction Exium Mups 20 is a medicine which reduces the amount of acid produced in your stomach. It is used to treat heartburn, acid reflux and problems in your food pipe. It is also used to prevent and treat stomach ulcers. You should take Exium Mups 20 as your doctor advises. The dose will depend on what you are being treated for, but it should be the lowest dose for the shortest amount of time needed to treat your condition. Normally it should be swallowed whole about an hour before a meal and at the same time each day.