The average Rolaids cash price is about $9.32 for a supply of: Tablet Chewable 550-110 MG 30 pcs. Get our free Rolaids coupon and be eligible to receive a discount. You can reduce your Rolaids cost by up to 75% with our free Rolaids discount card. Bring it to a participating pharmacy near you to save on your prescription medication.Calcium and magnesium are naturally occurring minerals that are necessary for many systems in the body. Calcium is necessary for bone formation and maintenance. The combination of calcium carbonate and magnesium hydroxide is used as an antacid to relieve indigestion, upset stomach, and heartburn. Calcium carbonate and magnesium hydroxide may also be used for purposes not listed in this medication guide.