What is the preferred treatment in an otherwise healthy infant who is mildly dehydrated from diarrhea?

• A. Oral rehydration solution with adequate fluids
• B. Intravenous fluids
• C. Formula feeding only
• D. Antidiarrheal medication

Answer: (A)

For mild dehydration from diarrhea in an otherwise healthy infant, oral rehydration with a suitable solution and adequate fluids is the preferred approach. These oral rehydration solutions are designed with the right balance of salts and glucose to promote efficient water absorption in the gut, so the infant can regain lost fluids without needing an IV. This method also supports ongoing nutrition, since feeding can continue as tolerated.

Intravenous fluids are reserved for cases where dehydration is more severe or if the child cannot take fluids by mouth or shows signs of poor perfusion or lethargy. Relying on formula feeding alone doesn’t adequately replace the liquid and electrolyte losses, and antidiarrheal medications are not recommended for infants due to limited efficacy and safety concerns. In practice, offer small, frequent sips of an oral rehydration solution and continue age-appropriate feeds, while monitoring for any signs that dehydration is worsening.