Compounded tirzepatide
TrimRx vs Willow
Checked in . Both sellers are re-checked on the same schedule; a price either side changes after that date will not be reflected here until the next check.
Quick answer
Willow costs $399 a real month and TrimRx costs $405 — a difference of $6 a month, or $70 a year. Both figures are computed from what each seller actually charges and how often, not from the price on its landing page.
What each one bills
| TrimRx | Willow | |
|---|---|---|
| True monthly cost | $405 | $399 |
| Advertised as | $259 | $399 |
| Charged | every 30 days | every calendar month |
| Each charge | $399 | $399 |
| Price basis | the same at every dose | not stated |
| Mandatory recurring fee | none found | none found |
| States it names | not published | 36 states |
| FDA warning letter | none on record | none on record |
Where they actually differ
- They bill on different clocks. TrimRx charges every 30 days and Willow charges every calendar month. That alone changes what a “month” costs, which is the whole reason this index recomputes every price.
- One price holds and the other climbs. TrimRx’s price is the same at every dose; Willow’s is not stated. See what titration does to an advertised figure.
- What they advertise is not what they bill. TrimRx advertises $259 and bills $405.
How we know
Both figures were read on the seller’s own site and recomputed over a 30.4375-day calendar month from the charge and the billing period it covers. Neither is a seller’s own “/mo”. The full working for each — the charge, the period, the arithmetic and the date it was read — is on its own page: TrimRx and Willow. The method is set out in how we verify.
To compare any two sellers in the index rather than these two, use the comparison tool.