Retatrutide reconstitution calculator

There is no approved product or dosing standard behind this calculator

Tirzepatide and sermorelin each have a real, FDA-approved brand-name product — Zepbound and Geref — whose own label states fixed dose strengths, which is what our other two molecule calculators cite directly. Retatrutide has neither. It remains investigational: Eli Lilly's own materials describe it as a molecule that “cannot be legally sold or marketed for human use,” and a direct query against FDA's Drugs@FDA database returns zero approved applications for it. There is consequently no FDA-set vial strength, no agency-reviewed dosing schedule, and no legitimate U.S. purchase channel to check a vial against.

What this tool below actually does is narrower than that context might suggest: it takes the vial size, diluent volume, and dose you type in and returns the concentration and draw volume that arithmetic implies — nothing more. It cannot confirm that a particular vial is what its label claims, that the dose you enter is appropriate for you, or that the product you drew that number from came from a legitimate source. A correct-looking syringe reading is not evidence that any of those things are true.

For the full picture — why retatrutide has no approval, what its trial data does and doesn't show, and why its situation is legally different from compounded tirzepatide's — read our full breakdown of retatrutide's approval status, evidence, and cost.