GLP-1 Side Effect Tracker: How to Spot Patterns Instead of Guessing

Why side effects deserve their own tracking category

GLP-1 medications commonly cause gastrointestinal side effects — nausea, constipation, diarrhea — along with fatigue and appetite changes, especially around dose increases. None of this is unusual or unexpected; it’s part of how these medications work and how the body adjusts to them. But “expected” doesn’t mean “not worth tracking.” The difference between a side effect that’s part of normal adjustment and one worth a call to your prescriber often comes down to timing and pattern — information that’s much easier to see in a log than to reconstruct from memory.

Without dated records, side effects tend to blur into a general impression: “I’ve felt kind of off.” With them, that impression becomes specific: “Nausea shows up for about three days after each dose increase, then settles.” One of those is useful to a prescriber. The other isn’t.

What to actually log

The side effect itself. Nausea, constipation, diarrhea, fatigue, decreased appetite, and anything else you notice — named specifically rather than lumped into a vague “not feeling great.”

When it happened, relative to your dose. The number of days since your last shot or dose change matters more than the calendar date on its own. A side effect on day 2 post-injection tells a different story than the same side effect on day 6.

How it changed over the following days. Did it ease off after a day or two, or persist? This is the detail most people can’t reliably recall weeks later without a log.

Any pattern across dose changes. If nausea shows up every time your dose increases and settles within a week, that’s a pattern worth naming explicitly rather than leaving as a vague sense of déjà vu.

Why timing matters more than severity alone

It’s tempting to track side effects purely on a severity scale — mild, moderate, severe — but severity without timing tells an incomplete story. A side effect that’s consistently mild but always shows up two days after your shot is a real pattern. A side effect that’s severe once and never recurs is a different kind of signal entirely. Logging both the “what” and the “when” is what turns a list of complaints into something you can actually read trends from.

Bowel patterns specifically

Constipation and changes in bowel habits are among the most commonly reported GLP-1 side effects, and also among the ones people are least likely to bring up unprompted in a doctor’s appointment — not because it doesn’t matter, but because it can feel like a minor or awkward thing to mention. A tracker that makes logging this as easy and unremarkable as logging weight or water intake removes that friction, and gives you an actual record instead of something you have to remember to mention out loud.

How Pelora tracks side effects

Pelora includes a dedicated side-effect and bowel-pattern log that sits on the same timeline as your shot and dose history, so patterns tied to dose changes are visible rather than something you’d have to piece together manually. Logging a side effect takes a few taps — what happened, and any notes — and it rolls into your broader history alongside protein, water, and weight tracking.

Side-effect logging is part of Pelora’s free core, along with shot tracking, nutrition check-ins, weight trends, and full CSV/JSON export, with no time limit. Everything stays local to your device by default.

What tracking side effects doesn’t do

A side-effect log shows you patterns. It doesn’t diagnose anything, and it can’t tell you whether a given side effect is expected, mild, or something to call your prescriber about — that judgment requires a clinician who knows your medical history. What the log does is make sure that when you do have that conversation, you’re working from an accurate record instead of a rough memory of “sometime last month.”