Last updated: March 2026
How Much Does Lactulose Cost?
Cost Breakdown by Type
| Type / Procedure | Without Insurance | With Insurance |
|---|---|---|
| Lactulose 10g/15mL Solution (473mL) | $10 – $25 | $3 – $10 |
| Lactulose 10g/15mL Solution (946mL) | $15 – $30 | $5 – $15 |
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 1–2 generic — covered by most plans; prescription required
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
Lactulose solution costs between $10 and $30 without insurance for a standard bottle. Generic versions are widely available.
Lactulose is a synthetic sugar used to treat chronic constipation and hepatic encephalopathy. It works by drawing water into the bowel to soften stools.
Lactulose typically takes 24 to 48 hours to produce a bowel movement. For hepatic encephalopathy, effects on mental status may be seen within hours.