MICRO-K LS vs MIRALAX

Independent side-by-side comparison.

Rated against independent regulatory sources·Last updated October 8, 2026·How we rate

Possible drug interaction. MICRO-K LS and MIRALAX are different prescription medicines. Combining or switching between them can cause interactions — talk to a pharmacist or prescriber before making changes. This page is not medical advice.

Attribute	MICRO-K LS	MIRALAX
Rating	New	70/100
Pharmacy pays	$0.05 /mL	$1.11 /g
Type	RX	RX
Active ingredient	POTASSIUM CHLORIDE	POLYETHYLENE GLYCOL 3350
Manufacturer	Kv Pharm	Braintree
Dosage forms	—	Powder
Drug class	Osmotic Laxative	Osmotic Laxative
Boxed warning	None	None
Treats	Hypokalemia	Constipation

micro-k ls miralax

Rating

New

70/100

Pharmacy pays

$0.05 /mL

$1.11 /g

Type

Active ingredient

POTASSIUM CHLORIDE

POLYETHYLENE GLYCOL 3350

Manufacturer

Kv Pharm

Braintree

Dosage forms

—

Powder

Drug class

Osmotic Laxative

Boxed warning

None

Treats

Hypokalemia

Constipation

Frequently asked questions

What is the difference between Micro-K Ls and Miralax?

Micro-K Ls contains Potassium Chloride, while Miralax contains Polyethylene Glycol 3350 — they have different active ingredients.

Ratings are based on FDA regulatory (recall-safety) data. This comparison is for general reference only — not medical advice. Always consult a licensed professional before choosing or switching a medication.