Pedialyte Equivalents for Adults
For adults with mild to moderate dehydration from diarrhea, Pedialyte, CeraLyte, and Enfalac Lytren are all appropriate low-osmolarity oral rehydration solutions (ORS), and adults should consume up to 2 liters per day ad libitum. 1
Recommended ORS Products for Adults
The 2017 IDSA guidelines explicitly list the following commercially available formulations as appropriate ORS options 1:
- Pedialyte Liters (Abbott Nutrition)
- CeraLyte (Cero Products)
- Enfalac Lytren (Mead Johnson)
All of these are low-osmolarity solutions (<250 mmol/L) that can be used safely across all age groups, including adults, for any cause of diarrhea 1.
What NOT to Use
Avoid these common beverages for rehydration 1:
- Apple juice
- Gatorade
- Commercial soft drinks
While one small study suggested Gatorade may be as effective as Pedialyte for viral gastroenteritis 2, the IDSA guidelines specifically recommend against sports drinks. The key issue is that Gatorade has inadequate sodium content and excessive sugar, making it suboptimal for true rehydration in diarrheal illness. The study also showed persistent hypokalemia in the Gatorade group, which is clinically concerning 2.
Dosing for Adults
For mild to moderate dehydration:
- Consume ORS ad libitum, up to approximately 2 L/day
- Replace ongoing losses: continue ORS until diarrhea and vomiting resolve 1
For severe dehydration:
- Start with intravenous isotonic crystalloid (lactated Ringer's or normal saline)
- Once pulse, perfusion, and mental status normalize, switch to ORS for remaining deficit replacement 1
Additional Fluid Recommendations
For adults with mild dehydration who cannot access commercial ORS, the 2001 European guidelines suggest maintaining adequate fluid intake guided by thirst, using 3:
- Drinks containing glucose (lemonades, sweet sodas, fruit juices)
- Soups rich in electrolytes
However, commercial ORS formulations remain superior because they contain the optimal glucose-to-sodium ratio that maximizes intestinal water absorption through coupled transport mechanisms 1.
Common Pitfall
The most common misconception is that ORS is only for children. Adults benefit equally from proper ORS use for mild to moderate dehydration, and the same low-osmolarity formulations work across all age groups 1. Many adults unnecessarily receive IV fluids when ORS would be equally effective and less invasive.