Which oral rehydration approach is preferred for mild-to-moderate dehydration due to diarrhea?

• A. Intravenous fluids only
• B. Plain water
• C. Oral rehydration solution (ORS) to restore fluids and electrolytes
• D. Sugary drinks

Answer: (C)

Oral rehydration with a prepared solution is best for mild-to-moderate dehydration from diarrhea because it rebalances fluids and electrolytes while promoting absorption in the gut. The drink combines water, electrolytes (especially sodium and chloride), and a small amount of glucose. The glucose enables sodium—and thus water—to be absorbed through the sodium-glucose transport mechanism in the small intestine, which restores hydration efficiently. This approach is safer and easier to administer than IV fluids when dehydration is not severe, and it avoids the risk of worsening electrolyte imbalances that plain water or high-sugar drinks can cause. Intravenous fluids are reserved for severe dehydration or when oral intake isn’t possible. Plain water doesn’t replace lost electrolytes, and sugary drinks can have high osmolarity that may worsen diarrhea and dehydration. So, using an oral rehydration solution to restore fluids and electrolytes is the most effective choice.