Last updated: March 2026
How Much Does Chlorthalidone Cost?
Cost Breakdown by Type
| Type / Procedure | Without Insurance | With Insurance |
|---|---|---|
| Chlorthalidone 12.5mg (generic) | $4 – $10 | $0 – $4 |
| Chlorthalidone 25mg (generic) | $4 – $12 | $0 – $5 |
| Chlorthalidone 50mg (generic) | $4 – $15 | $0 – $6 |
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 — guideline-preferred thiazide diuretic for blood pressure
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
Chlorthalidone costs $4 to $15 per month without insurance. It is available at most $4 generic programs and is one of the most cost-effective blood pressure treatments.
Clinical guidelines increasingly favor chlorthalidone over hydrochlorothiazide (HCTZ) because of its longer duration of action and stronger evidence for cardiovascular outcomes reduction.
Common side effects include increased urination, low potassium, dizziness, and increased blood sugar. Regular blood work helps monitor for electrolyte imbalances.