The document summarizes various acid-controlling agents including antacids, H2 antagonists, proton pump inhibitors, sucralfate, and misoprostol. It describes their mechanisms of action, therapeutic uses, side effects, drug interactions, and nursing implications. The stomach normally secretes acid and enzymes to digest food, but excessive acid can cause issues. Antacids neutralize stomach acid, H2 blockers reduce acid production, and proton pump inhibitors completely block acid secretion.