Key takeaways
Calcium polycarbophil (FiberCon) and docusate/senna (Senna-S) are both over-the-counter medications used to treat occasional constipation, but they work in different ways. Calcium polycarbophil is a bulk-forming laxative that keeps water in the stool, making it heavier and easier to pass, and is less likely to cause gas and bloating compared to natural fiber laxatives, like Metamucil. In contrast, docusate/senna combines a stool softener (docusate) that draws water into the intestines and a stimulant laxative (senna) that helps push the stool out, often working within 6 to 12 hours. While FiberCon is a synthetic fiber supplement, Senna-S contains natural ingredients and works faster. FiberCon is generally more gentle and can take up to 3 days to work, whereas Senna-S can cause stomach cramps and loose stools but provides quicker relief. Both medications should not be used for more than 7 days without consulting a healthcare professional.
