What are the proper instructions for reconstituting GoLYTELY (polyethylene glycol 3350 bowel preparation)?

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Last updated: March 12, 2026 • View editorial policy

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GoLYTELY Reconstitution Instructions

Dissolve the entire 4-liter jug contents (236 g polyethylene glycol 3350,22.74 g sodium sulfate, 6.74 g sodium bicarbonate, 5.86 g sodium chloride, and 2.97 g potassium chloride) in water to a final volume of 4 liters to create an isosmotic solution. 1

Preparation Steps

  • Add tap water to the fill line marked on the 4-liter jug containing the white powder formulation 1
  • Shake vigorously until all powder is completely dissolved to ensure proper electrolyte concentration 1
  • Chill the solution before consumption as it is more palatable when cold 1

Critical Safety Warning

Never prepare GoLYTELY with anything other than water to the exact 4-liter volume specified. Inappropriate preparation (using incorrect volumes or concentrations) has resulted in fatal electrolyte disturbances in pediatric patients 2. The electrolyte balance in the formulation is precisely calculated to maintain isosmotic conditions and prevent dangerous shifts in serum electrolytes 1.

Administration Instructions

Timing Considerations

  • For split-dose regimens (recommended approach): Consume 2 L between 7-9 PM the evening before colonoscopy, then the remaining 2 L between 7-9 AM on the day of the procedure 3
  • Complete the final dose at least 2 hours before the colonoscopy start time 3
  • Begin the second portion 4-6 hours before the scheduled procedure 3

Consumption Method

  • Drink 240 mL (8 oz) every 10 minutes 1
  • Rapid drinking of each portion is superior to continuous small sips 1
  • Continue until watery stool is clear and free of solid matter, which typically requires at least 3 liters 1

Dietary Restrictions

  • No solid food should be consumed during the 3-4 hours before starting the solution 1
  • Absolutely no solid foods within 2 hours of taking GoLYTELY 1

Expected Effects and Management

  • First bowel movement should occur approximately one hour after starting 1
  • If severe bloating, distention, or abdominal pain occurs, slow or temporarily stop administration until symptoms resolve 1
  • If severe discomfort develops, drink each portion at longer intervals 1

Important Precautions

  • Discard any unused portion after preparation 1
  • Do not take oral medications within one hour of starting GoLYTELY, as they may be flushed from the GI tract without absorption 1
  • Patients with impaired gag reflex, altered consciousness, or risk of aspiration require close observation during administration 1

Storage After Reconstitution

Once reconstituted, the solution should be used within the timeframe specified for your bowel preparation regimen. The chilled solution improves palatability and patient tolerance 1.

References

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Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.