How to track a weekly injection like semaglutide

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.

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

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.

This guide is about record keeping and unit arithmetic. It is not medical advice. See the medical disclaimer.

Start your log today

PepVault is free to download for Android, iPhone, iPad and Mac. Add your first vial and log your first dose in under a minute.

Get it on Google Play Download on the App Store Download on the Mac App Store

For Android, iPhone, iPad and Mac. On the App Store the app is listed as PeptideMate.

PepVault Free peptide tracker app Get the app