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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

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The information at is not a substitute for medical advice. Always consult your doctor or pharmacist.

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.