P40 D SR Capsule is a prescription medication used to treat gastritis, dyspepsia (indigestion), and gastroesophageal reflux disease (acid reflux). Overproduction of acid in the stomach is a chronic (long-term) ailment known as gastroesophageal reflux disease (GERD). The P40 D SR Capsule lessens the production of stomach acid and eases the discomfort of acid reflux and heartburn. For it to be successful, you must take it precisely as directed. A few easy lifestyle adjustments can help lessen GERD symptoms. Try to avoid the items that cause heartburn; eat smaller, more frequent meals; if you are overweight, try to reduce your weight; and find ways to unwind. Avoid eating three to four hours before bed.