# How to track a weekly injection like semaglutide

> A simple tracking routine for once-weekly injections: what to log on dose day, how to handle reminders and which measurements to record between doses.

Source: https://peptidetracks.com/guides/tracking-weekly-injections
Last updated: 2026-10-08

For a once-weekly injection, log four things on dose day (**date and time, amount, injection site and the pen or vial used**), set a repeating weekly reminder, and record your weight and any side effects on a fixed day each week. A week is long enough to forget both whether you took the dose and which side you used, which is exactly what the log is for.

GLP-1 medicines such as semaglutide and tirzepatide are prescription treatments. Your dose and schedule are set by your prescriber. This guide is about keeping the record.

## On dose day

| Log | Example |
| --- | --- |
| Date and time | Sunday, 9:00 am |
| Name and amount | As prescribed |
| Injection site | Abdomen, left |
| Pen, vial or lot | From the label |
| Notes | Anything out of the ordinary |

## Set one repeating reminder

Pick the day and time you were given and set a weekly reminder for it. If your prescriber changes the day, change the reminder the same day so the two never disagree.

If you miss a dose, follow the instructions in the patient leaflet or ask your pharmacist. Log what you actually did.

## Alternate sides and write it down

With seven days between injections, "which side was it last time?" is a real question. Recording the site with each dose answers it. See [how to keep a site rotation log](https://peptidetracks.com/guides/injection-site-rotation-log).

## Between doses

Short, regular notes are more useful than long, occasional ones.

- **Weight:** same day each week, same time of day.
- **Waist or other measurements:** every two to four weeks.
- **Side effects:** on the day they happen, with a word on severity.
- **Appetite, energy, sleep, mood:** a quick check-in a few times a week.

## Before each appointment

Dose changes are your prescriber's decision, and a clear record helps them make it. Bring:

- The dates of every dose since the last visit
- Any missed or late doses
- Side effects and when they happened
- Your weight trend

## Doing this in PepVault

- Type the medicine name once; it becomes a one-tap chip on the [dose entry screen](https://peptidetracks.com/features/dose-log).
- Create a weekly [schedule with a reminder](https://peptidetracks.com/features/dose-reminders).
- Tap the [body map](https://peptidetracks.com/features/injection-site-tracking) to record the site.
- Add weight, body fat and waist in [Progress](https://peptidetracks.com/features/progress-tracking), with check-ins for mood, energy, sleep and appetite.
- [Export the history](https://peptidetracks.com/features/csv-export) before your appointment.

## Common questions

### Can a peptide tracker be used for GLP-1 injections?

Yes. PepVault logs any named compound, so it works for a once-weekly prescription the same way it does for anything else.

### Does the app tell me when to increase my dose?

No. PepVault does not recommend doses or schedules. It records the ones you enter.


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## About PepVault

PepVault is a free peptide tracker app for Android, iPhone, iPad and Mac. It keeps a personal log of doses, vial inventory, injection sites, schedules and reminders, body measurements and side effects, and exports the history as a CSV file.

- Website: https://peptidetracks.com
- Android (Google Play): https://play.google.com/store/apps/details?id=pepvault.peptide.tracker
- iPhone, iPad and Mac (App Store, listed as PeptideMate - Peptide Tracker): https://apps.apple.com/us/app/peptidemate-peptide-tracker/id6814232280

PepVault is for personal record keeping. It does not give medical advice or recommend doses.