Famotidine (Pepcid) is a type of antihistamine that blocks the release of stomach acid. It is used to treat stomach or intestinal ulcers. It can also relieve heartburn from acid reflux. It is more popular than comparable drugs. It is available in generic and brand versions. Generic famotidine is covered by most Medicare and insurance plans, but some pharmacy coupons or cash prices may be lower. With the Patient Assistance Program from HealthWell Foundation, contact the program to see how they can financially help you out.