Last updated: March 2026
How Much Does Polyethylene Glycol (MiraLAX Rx) Cost?
Cost Breakdown by Type
| Type / Procedure | Without Insurance | With Insurance |
|---|---|---|
| PEG 3350 Powder 238g | $8 – $15 | $0 – $5 |
| PEG 3350 Powder 510g | $12 – $20 | $3 – $8 |
What Affects the Cost
- Brand-name vs. generic availability
- Insurance formulary tier placement
- Pharmacy choice (retail vs. mail-order vs. Costco)
- Manufacturer savings cards and coupons
- Dosage and quantity prescribed
- Geographic location
Insurance Coverage
Typical coverage: Tier 1 generic — covered by most plans; also available OTC
Most insurance plans use a tiered formulary: Tier 1 (generic) $0-$15 copay, Tier 2 (preferred brand) $25-$75, Tier 3 (non-preferred brand) $50-$150, Tier 4 (specialty) $100-$500+. Prior authorization may be required for certain medications. Step therapy may require trying cheaper alternatives first.
How to Save Money
- Always ask for generic when available — saves 50-90%
- Use GoodRx, RxSaver, or similar discount cards
- Costco pharmacy is open to non-members and often has lowest prices
- Mark Cuban's Cost Plus Drugs offers transparent low pricing
- Manufacturer patient assistance programs provide free medication to qualifying patients
- HSA/FSA funds can cover medication costs tax-free
Related Procedures & Costs
Frequently Asked Questions
Polyethylene glycol 3350 costs between $8 and $20 without insurance. Store-brand versions are often available for less.
PEG 3350 is an osmotic laxative used to treat occasional constipation. It works by drawing water into the colon to soften stools and promote bowel movements.
PEG 3350 is generally considered safe for daily use under medical supervision. However, OTC use should typically be limited to 7 days unless directed by a doctor.