Retatrutide tracker: logging doses, levels and a custom half-life
Short answer: retatrutide is an investigational medication, not an approved one, so mainstream GLP-1 apps built around the five brand pens have nowhere to put it. If you are taking it under medical supervision, the record you keep matters even more than usual: exact doses and dates, an estimated level curve built on its roughly 6-day half-life, injection sites and side effects, all exportable for the clinician overseeing you.
What retatrutide is, briefly
Retatrutide is a weekly injectable currently in clinical trials. It works on three receptors (GLP-1, GIP and glucagon), which is why it is sometimes called a triple agonist, and its published half-life is around 6 days, similar territory to tirzepatide's 5 days. It is not approved by regulators, it has no brand pen, and nothing on this page is an encouragement to obtain or take it. This guide is about record keeping for people who are already on it with medical oversight.
Why tracking it is harder than tracking Mounjaro
- Brand-pen apps do not list it. Trackers built around Mounjaro, Wegovy and Ozempic often have no entry for retatrutide at all, so users resort to logging it as the wrong drug, which corrupts the record and any level estimate.
- It usually comes as a vial. That means reconstitution maths, remembering the concentration of this particular vial, and drawing a precise number of units rather than clicking a pen.
- Titration is individual. Study protocols step doses up over weeks; whoever is supervising you sets your plan, and you need to know which step you are on at a glance.
- The record is clinically important. With an investigational compound, your supervising clinician will want precise dates, amounts, sites and side effects, not a best guess.
What a proper record looks like
- Every dose with date, time, amount and injection site, logged at the moment of injection
- The vial's reconstitution details stored once, so each draw amount is consistent
- An estimated level curve using retatrutide's own half-life, not a borrowed one
- Side effects with severity and timing against the dose timeline
- Weight trend over the whole protocol
- One-tap export for the clinician overseeing you
How PepLevel handles it
PepLevel works with any injectable, from brand pens to vials. Add retatrutide as its own medication with your supervising clinician's schedule, its half-life drives the level curve, and each dose logs in one tap with its injection site. Save the vial with the water you added and the app shows each planned dose as a volume in mL, plus syringe units if you enter the scale. Everything stays on your device, and the doctor export gives your clinician a clean record of exactly what happened and when. The app never suggests doses for retatrutide or anything else; it records the plan you were given.
Any injectable, one clean record
Custom compounds, custom half-lives, custom schedules. Coming soon to the App Store.
Get PepLevelMedical disclaimer: retatrutide is an investigational compound that is not approved for general use. This guide is record-keeping information only; it is not medical advice, and nothing here endorses obtaining or taking any unapproved medication. PepLevel does not sell, source or link to any substance and never calculates or suggests doses. Decisions about any medication belong with the clinician supervising you.