Tracking

GLP-1 Side Effects Tracker: A Simple Logging System

GLP-1 Companion · 6 min read

Most side-effect articles stop at a list of nausea, constipation, reflux, fatigue, and headaches. That is not enough. When you are deciding whether to hold a dose, message your clinician, or change your routine, the useful data is timing plus severity plus dose context.

My position: a GLP-1 side effects tracker is worth paying for only if it makes follow-up care easier. If it cannot show your worst day after injection, your dose escalation dates, and a clean trend over time, it is just a diary with a medical label.

What to Log Each Week

Score each symptom on a 1–10 scale, where 1 is "barely noticed" and 10 is "could not function." Even a "0" week is data — it is the baseline that lets you read the bad weeks.

• Nausea (peak severity and average over the week).
• Vomiting (count of episodes, if any).
• Diarrhea or constipation (which, how many days).
• Reflux / burping / "sulfur burps".
• Bloating.
• Fatigue.
• Headaches.
• Dizziness.
• Mood — irritability, low mood, flat affect (anhedonia).
• Sleep quality.
• Injection-site reactions — redness, lumps, tenderness, with site.
• Hair shedding (note as monthly, not weekly — easier to perceive).

The Two-Minute Weekly Routine

On your injection day, before the shot, take two minutes to rate the past 7 days. This is easier than logging in the moment when you feel bad and forget by Monday.

1. Rate the headline symptoms (nausea, fatigue, GI) on 1–10.
2. Note any peak symptom that was significantly worse than average.
3. Note anything new or unusual.
4. Note the day in the cycle (day 1 = injection day, day 2, 3 …) when the worst symptom hit.
5. Save and move on.

Reading Side Effect Patterns Over Time

After 4–8 weeks of logging, distinct patterns usually emerge. These are what to look for.

The titration spike

Side effects almost always increase in the 1–2 weeks immediately after a dose escalation, then return toward baseline. A spike-and-return pattern is the expected response — not a reason to stop. A continuing escalation is the reason to call your provider.

The post-injection peak

On semaglutide and tirzepatide, peak plasma concentration occurs 1–3 days post-injection. Nausea and fatigue often follow this curve, peaking days 2–4 and improving by days 6–7. If your worst day is reliably day 3 after injection, that is normal pharmacokinetics.

The food-triggered episode

High-fat, fried, very large, or strongly aromatic meals are the most common GI triggers on GLP-1 medications. Logging which meals preceded bad episodes usually reveals the trigger within 2–3 occurrences.

The chronic baseline

A symptom that does not return to baseline after a dose escalation cycle (~2 weeks) is no longer titration. It is now a steady-state effect worth a conversation with your clinician.

When to Call Your Doctor (vs. Log and Wait)

A side-effect log gives you a clear basis for the call/wait decision. These are the patterns that warrant escalation.

• Severe abdominal pain that radiates to the back — possible pancreatitis. Call immediately.
• Persistent vomiting (>24 hours) preventing fluid intake — risk of dehydration; call same day.
• Severe upper-right abdominal pain, jaundice, dark urine — possible gallbladder. Call immediately.
• Nausea or fatigue at severity 7+ for more than 2 weeks at a steady dose — call to discuss holding or de-escalating.
• New or worsening depression or suicidal thoughts — call same day. GLP-1 mood effects are being actively studied; do not wait.
• Hypoglycemia (low blood sugar) episodes — particularly relevant if you also take insulin or sulfonylureas.
• Injection-site reaction that does not resolve in 1–2 weeks, spreads, or worsens — message your provider.

Three weeks of "7/10 nausea" recorded with peak day, food, and dose context is a far more useful message to a clinician than "I have been feeling really bad lately."

Common Side-Effect Logging Mistakes

• Only logging bad weeks — the clean weeks are the baseline.
• Forgetting to note recent dose escalations — makes symptom spikes look mysterious.
• Logging from memory at the end of the week — recency bias dominates.
• Treating "0" as something not worth logging — recording the absence of a symptom is what makes its presence meaningful.
• Conflating multiple symptoms ("I felt bad") — name each one separately.

Pairing Side Effects With Other Data

Side effects are most useful in context. A few cross-references that consistently produce insight:

• Side effects × dose history — identifies titration symptoms vs. steady-state symptoms.
• Side effects × hydration and protein — both have direct effects on GI symptoms.
• Side effects × food log — surfaces personal trigger foods.
• Side effects × sleep quality — fatigue and mood track sleep more strongly than most people expect.
• Side effects × menstrual cycle — for menstruating users, premenstrual nausea can stack with medication nausea.

Key Takeaways

• Log all symptoms weekly on a 1–10 scale — including "0" weeks.
• Note the day-in-cycle for peak symptoms; days 2–4 are typically the worst.
• Expect a spike-and-return pattern in the 1–2 weeks after each dose escalation.
• Persistent severity 7+ at a steady dose is a call-your-clinician signal.
• A clean log turns vague reports into specific conversations and better dose decisions.

If you want to do this in a notes app, keep it to date, dose, symptom, severity, and peak day. If you want the app version, Nuvo turns the same fields into a weekly tracker and visit summary instead of another spreadsheet you forget to update.