Pharmacotherapy differs from surgery (surgical therapy), radiation (radiation therapy), movement (physical therapy), and other types of treatment in that it uses pharmaceutical drugs. Pharmacotherapy is occasionally used by professionals to refer to medication rather than surgery or other forms of treatment. The treatment of hepatitis C virus (HCV), irritable bowel syndrome, gastroesophageal reflux disease (GERD), and peptic ulcer disease are just a few of the central issues in gastrointestinal pharmacotherapy that are rapidly evolving. For individuals with moderate to severe irritable bowel syndrome symptoms, pharmacotherapy is currently the first-line treatment. A gastrointestinal drug is a drug that has effects on the gastrointestinal tract, such as reducing gastric acidity, regulating gastrointestinal motility and water flow, and enhancing digestion.