Levothyroxine costs $0–$15/month.
Levothyroxine (generic Synthroid) costs $4–$15/month for most insured patients in 2026, with no prior authorization required and cash prices starting at $4/month at Walmart and Costplus — the most commonly prescribed thyroid medication in the United States.
Estimates only. Verify with your pharmacy and insurer before filling. Not medical, financial, or insurance advice.
Levothyroxine prices by source
Sources: manufacturer published pricing · Costplus Drug Co. catalog · Walmart $4 list · GoodRx public pricing.
Your cost by plan
Tier from each carrier’s 2026 formulary — source documents linked on each plan card below. Use the calculator above for a personalized estimate based on your deductible state.
Levothyroxine cost questions
See how Levothyroxine compares
Source URLs for Levothyroxine have not yet been manually verified. Estimates above are modeled from public pricing patterns and manufacturer-published list prices.
- • Manufacturer published pricing pages
- • NADAC National Average Drug Acquisition Cost
- • Carrier-published formulary tiers (where known)
- • Cost Plus Drugs / mail-order public pricing
- • FDA Orange Book (generic availability)