How to keep a Zepbound logbook

A Zepbound logbook in GLPath starts with the same weekly habit as any injectable: log the date, the dose in mg, and the site on a body map right after the shot. What makes it worth keeping is what those entries build into over time — a dose step-chart that shows every mg change against the date it happened, sitting directly beside your weight trend, plus a side-effect history you didn't have to reconstruct from memory.

What's different about logging a tirzepatide dose?

Zepbound's active ingredient is tirzepatide — the same one in Mounjaro. GLPath logs the dose to a decimal place, so whatever size step a prescriber actually used — half a milligram or a whole one — comes through on the chart exactly as logged rather than rounded into something coarser. Your prescribed dose from Settings carries onto each new entry so you're confirming a number rather than retyping it. If you've moved between Zepbound and Mounjaro at any point, each log keeps the medication it was actually recorded under, so your history stays accurate rather than getting rewritten by a later change in Settings.

Why look at the step chart instead of a single entry?

One dose entry is just a fact. The dose step-chart on your dashboard and in Reports draws your full history as a stepped line — flat while the dose holds, stepping exactly on the date it changed — laid next to your weight chart so the two are easy to scan together. GLPath doesn't draw any conclusion from where they line up; it shows both series and leaves the reading to you. The doses feature page covers the rest of what that chart does, including the brush explorer for zooming into a specific stretch.

Where does the side-effect list come from?

Choosing Zepbound as your medication sets your side-effect picker to the list documented for tirzepatide — common gastrointestinal entries plus injection-site reactions — so you're selecting from something relevant rather than typing the same words out each week. An "Other" option lets you add a private term of your own if something you're noticing isn't listed. The side-effect diary guide covers how that pick-list, the custom terms, and the 90-day chart fit together.

What does the site history actually show over time?

The site record doesn't care which brand name a given entry was logged under — a tap on the body map is saved with that specific dose regardless, so a run of entries that crosses a Zepbound-to-Mounjaro switch keeps its site history intact and in order rather than splitting into two disconnected logs. The injection-site guide covers what that combined record looks like and how to read it once you've got enough entries logged to see a shape in it.

What can you do with the record later?

Every dose you log stays exportable — a free CSV with no limit on history, and a full-history PDF (the free "Since the beginning" preset) covering the same ground; shorter custom-range PDFs are part of Plus. None of it is dosing guidance. What it's actually good for is the long view: a year or two of entries reads very differently laid end to end than any single week does on its own, whether you're still on Zepbound, moved to Mounjaro, or somewhere else on the path by then.