The first week of any new medicine is worth documenting carefully, and Mounjaro is no exception. Mounjaro is tirzepatide, given as a single injection under the skin once a week, and licensed for type 2 diabetes and, in some markets, weight management under specific criteria set out in your own prescriber's assessment and patient information leaflet. Whatever brought you to it, a clear first-week record gives your next review appointment something concrete to work from, rather than a vague memory of how things felt.
What to record about the injection itself
Start with the basics: the date and time of your first injection, which part of the body you used, and whether you needed help or a demonstration from a nurse or pharmacist. If you were given written instructions or a device leaflet, keep it somewhere you can find again, since you may want to check it during the week.
What to note day by day
Through the first seven days, a short daily note is more useful than trying to reconstruct the week afterwards from memory. Consider recording:
- Appetite: whether it changed, and roughly when you first noticed anything different.
- Digestive symptoms such as nausea, bloating, constipation, or loose stools, and roughly how they affected your day.
- Energy levels and sleep, since both can be affected by a new routine as much as by the medicine itself.
- Any injection-site reaction, including where it was and how long it lasted.
- Anything else going on that week, such as illness, travel, or a change in diet, that might make symptoms harder to attribute.
Your current medicine list
It is worth using the first week to write out a complete, current list of everything else you take, including prescription medicines, over-the-counter products, and supplements, with strengths and how often you take them. Having this ready before your first review means less scrambling to remember details under time pressure, and gives your prescriber a fuller picture if anything unexpected comes up.
Practical details worth noting too
Beyond symptoms, it can help to record a few practical things that are easy to forget by the time your review comes around. Note where you keep your pens and whether storage has been straightforward. Note whether you received clear instructions on injection technique and felt confident using the device, or whether you had questions you did not get to ask. If you were given a starter pack or welcome materials, keep them together with your notes rather than letting them scatter around the house.
It is also worth writing down any questions that occur to you during the week, even ones that feel minor at the time. A first review appointment often moves quickly, and a written list means you are less likely to leave without asking something that has been on your mind since day two or three.
A simple structure to follow each day
If a blank page feels daunting, a short daily structure can make the habit easier to keep up through a busy first week. Something as simple as noting the date, one line on appetite, one line on any digestive symptom, and one line on anything else notable takes only a minute or two and adds up to a genuinely useful week of data. Some people prefer a notes app they already check daily; others prefer a physical notebook kept by the fridge, where pens are often stored. The format matters far less than actually filling it in consistently.
Setting expectations for the record, not the outcome
This article cannot tell you what a normal or expected first week looks like, because that varies between people and depends on your own health history. It is also worth remembering that tirzepatide is a different active ingredient from semaglutide, so descriptions written about other GLP-1 brands do not necessarily apply to your experience. What this record can do is give your prescriber accurate, dated information rather than an impression formed after the fact.
If you experience severe or persistent vomiting, inability to keep fluids down, severe abdominal pain, signs of a severe allergic reaction, or symptoms of very low blood sugar, treat that as urgent and seek medical advice promptly rather than waiting for a scheduled follow-up.