What dietary recommendation is most appropriate for a patient experiencing constipation on calcium channel blockers?

Increasing fiber intake is a pivotal dietary recommendation for a patient experiencing constipation, particularly when they are on calcium channel blockers. These medications can cause gastrointestinal side effects, including constipation, due to their effects on smooth muscle relaxation and gastrointestinal motility.

Fiber plays a crucial role in digestive health by adding bulk to the stool and facilitating easier passage through the intestines. A diet rich in fiber—found in fruits, vegetables, whole grains, and legumes—can help stimulate bowel movements and alleviate constipation. This approach not only improves stool consistency but also promotes overall gut health.

The other answer choices suggest dietary modifications that either do not address the underlying issue of constipation or could potentially worsen it. Increasing sugar intake could lead to further digestive complications and does not contribute any beneficial effects on bowel regularity. Limiting water intake would likely exacerbate constipation, as adequate hydration is essential for fiber to effectively work in the digestive tract. Restricting fruit consumption, which is often high in fiber, would be counterproductive for someone needing to relieve constipation. Therefore, increasing fiber intake is the most appropriate recommendation for this situation.