Polyethylene Glycol (Miralax) Pharmacology
May 08, 2025•14 min
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Episode description
On this episode of the Real Life Pharmacology podcast, I discuss Miralax (polyethylene glycol) pharmacology, adverse effects, and much more.
MiraLAX is an osmotic laxative commonly used to treat occasional constipation by retaining water in the stool to increase stool frequency and soften consistency.
The standard adult dose of MiraLAX is 17 grams (approximately one heaping tablespoon) dissolved in 4 to 8 ounces of liquid once daily.
Electrolyte imbalances are rare but possible with prolonged or excessive use of Miralax, particularly in elderly or renal-impaired patients.
Advise patients to maintain adequate hydration while using MiraLAX to support its mechanism and reduce side effects.
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