Comparative Pharmacology
Head-to-head clinical analysis: GLYCOLAX versus GOLYTELY.
Peer-Reviewed Evidence
Head-to-head clinical analysis: GLYCOLAX versus GOLYTELY.
GLYCOLAX vs GOLYTELY
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Osmotic laxative. Polyethylene glycol (PEG) increases intraluminal water volume in the colon by osmosis, promoting stool passage and relieving constipation.
Polyethylene glycol 3350 is an osmotic laxative that induces diarrhea by retaining water in the bowel lumen through osmotic activity. Electrolytes (sodium sulfate, potassium chloride, sodium bicarbonate) prevent significant electrolyte absorption or loss.
17 g (1 heaping tablespoon) dissolved in 4-8 ounces of liquid once daily, orally.
240 mL (oral) every 10 minutes until 4 L consumed or rectal effluent is clear; typically 4 L total over 3-4 hours.
None Documented
None Documented
Not applicable due to negligible systemic absorption; local colonic transit time approximately 2-4 hours.
Not applicable (PEG 3350 is not significantly absorbed; effective half-life in GI tract is approximately 2-4 hours for colonic clearance).
Minimally absorbed; excreted primarily unchanged in feces via osmotic action. Renal excretion negligible (<0.2% absorbed dose).
Primarily fecal elimination of unabsorbed polyethylene glycol 3350. Minimal systemic absorption (<0.06%), less than 0.06% recovered in urine as intact PEG 3350; electrocytes and sulfate (from sodium sulfate) are renally excreted.
Category C
Category C
Osmotic Laxative
Osmotic Laxative