RN instructed patient about medication Famotidine that is used to treat gastroesophageal reflux disease, a condition in which backward flow of acid from the stomach causes heartburn and injury of the esophagus. RN instructed patient to swallow the tablets and capsules with a full glass of water. RN also explained about side effects of treatment such as: hives, skin rash, itching, swelling of the face, throat, tongue, lips, eyes, hands, feet, ankles, or lower legs. RN instructed to call Physician immediately if any of these signs or symptoms appear. Patient and caregiver voiced understanding of all instructions given.