Skip to main content

GaviLyte G Dosage

Generic name: POLYETHYLENE GLYCOL 3350 236g in 274.31g, SODIUM SULFATE ANHYDROUS 22.74g in 274.31g, SODIUM BICARBONATE 6.74g in 274.31g, SODIUM CHLORIDE 5.86g in 274.31g, POTASSIUM CHLORIDE 2.97g in 274.31g
Dosage form: powder, for solution
Drug class: Laxatives

Medically reviewed by Last updated on Dec 11, 2023.

Dosage Overview

GaviLyte-G, supplied as a powder, must be reconstituted with water before its use; it is not for direct ingestion [see Dosage and Administration (2.2), Warnings and Precautions (5.8)]. The 4 liter reconstituted GaviLyte-G solution contains: 236 grams of polyethylene glycol (PEG) 3350, 22.74 grams sodium sulfate (anhydrous), 6.74 grams of sodium bicarbonate, 5.86 grams of sodium chloride, and 2.97 grams of potassium chloride. GaviLyte-G is supplied with lemon flavor pack.

Administration Instructions Prior to Dosage

On the day prior to the colonoscopy, instruct patients to:

  1. Take only clear liquids, but avoid red and purple liquids. Patients may consume a light breakfast.
  2. Early in the evening prior to colonoscopy, fill the supplied container containing the GaviLyte-G powder with lukewarm water (to facilitate dissolution) to the 4 liter fill line. The solution is clear and colorless when reconstituted to a final volume of 4 liters.
  3. After capping the container, shake vigorously several times to ensure that the ingredients are dissolved. When reconstituted use within 48 hours.


The following is the recommended dose of reconstituted GaviLyte-G solution for adults. Instruct patients they may consume water or clear liquids during the bowel preparation and after completion of the bowel preparation up until 2 hours before the time of the colonoscopy. The solution is more palatable if chilled prior to administration.

  • Adults: Instruct patients to drink a total of 4 liters at a rate of 240 mL (8 oz.) every 10 minutes, until 4 liters are consumed or the rectal effluent is clear. Rapid drinking of each portion is preferred to drinking small amounts continuously. For NGT, rate is 20-30 mL per minute (1.2 – 1.8 liters per hour).

The first bowel movements should occur approximately one hour after the start of GaviLyte-G administration. Continue drinking until the watery stool is clear and free of solid matter.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.