# Common GLP-1 Side Effects and How to Track Them

Source: https://www.trackpep.com/blog/glp-1-side-effects-tracker

> Educational information only. Not medical advice, and not a dosing recommendation. TrackPep records what you enter and converts a dose you were prescribed into a syringe reading; it never decides a dose for you. Talk to a licensed clinician.

Nausea, fatigue, and injection site reactions are common on GLP-1 therapy. A structured log helps you and your clinician manage them.

Starting a GLP-1 receptor agonist such as semaglutide or tirzepatide can be life-changing for glycaemic control and weight management. But side effects are common — especially during the titration phase.

## Most common side effects

| Side effect | Typical timeline | Frequency |
|---|---|---|
| Nausea | First 4–8 weeks | Very common |
| Vomiting | First 4 weeks | Common |
| Diarrhoea | Variable | Common |
| Constipation | Ongoing | Common |
| Injection site reactions | Any time | Common |
| Fatigue | First 4 weeks | Moderately common |

## Why tracking matters

A side-effect log turns subjective experience into objective data. When you walk into your doctor's appointment with a chart showing "nausea on days 3–5 after each dose" you enable a much more productive conversation about dose adjustment, antiemetic support, or switching therapies.

## What to log

- **Date and time** of symptom onset
- **Severity** (mild / moderate / severe)
- **Duration** (hours)
- **Timing relative to dose** (same day, next day, etc.)
- **Injection site** (abdomen L, abdomen R, thigh L, etc.)
- **Interventions** (ginger tea, antiemetic, nothing)

## Tips for reducing GI side effects

1. Inject in the thigh rather than the abdomen — absorption is slightly slower and may reduce nausea.
2. Take your dose right before bed so you sleep through the peak.
3. Eat small, bland meals on dose day.
4. Stay hydrated — dehydration amplifies fatigue and nausea.
5. Titrate up slowly. Do not rush the dosing schedule.

TrackPep includes a dedicated side-effect logger that ties each symptom to a specific dose and compound, so you can spot patterns over weeks and months — not just guess.

By TrackPep Team.