Lippincott Respiratory Practice Exam

Docusate sodium, commonly known as Colace, is a stool softener that is primarily used to facilitate bowel movements by making the stool easier to pass. Its mechanism of action involves reducing surface tension, which allows water and fats to penetrate the stool, thereby softening it. In a patient with pneumonia, especially if they are on medications that may cause constipation (such as opioids or certain sedatives), maintaining regular bowel movements is important for overall health and comfort. Softening the stool can help prevent complications associated with constipation, such as straining during bowel movements, which can be particularly problematic for patients who may already be experiencing respiratory distress.

While lubricating the stool and increasing stool bulk can also promote bowel health, those functions are not the primary actions of docusate sodium. Stimulating peristalsis refers to promoting the movement of the intestines, which is more characteristic of stimulant laxatives rather than stool softeners. Therefore, docusate sodium is specifically indicated for its role in softening the stool to support proper bowel function in the context of the patient's condition.