If your prescription has moved from Ozempic to Mounjaro, a clinician made that call with your history, your other medicines, and your recent results in front of them. This page has no view on that and offers no instructions about it; ask the prescribing team anything you want to know about the reasoning or the practicalities. What it does cover is the thing nobody usually mentions at the appointment, which is what becomes of the records you have been keeping.
Ozempic is semaglutide and is licensed for type 2 diabetes. It is supplied as an injection given once a week, and official labelling for semaglutide taken by mouth now covers tablets under that name as well, so what you were handed decides what your old record was describing. Mounjaro is tirzepatide, given as an injection once a week, licensed for type 2 diabetes and, in some markets, for weight management too.
If your previous pack was the weekly injection, the outward rhythm carries over and day-to-day life may look much as it did. If it was tablets, the routine changes more than the calendar does. Two different active ingredients, and a prescription that has just been rewritten, is the situation this article is written for.
Your baseline is the fortnight you have just lived
Whatever you already track, take a reading of it now rather than reconstructing it later. The last two weeks under the previous prescription are the fairest comparison point you will ever have, and they stop being available the moment you forget them.
For someone treated for type 2 diabetes that baseline is usually broader than weight alone. Note your recent glucose readings as they actually were, including the awkward ones. Note the most recent HbA1c you were told, and when it was taken. Note where your weight sat, if you track it. Note how you had been feeling in a general way, because a change in energy or appetite three weeks from now is only interpretable against something.
Glucose records deserve more attention for a while
This is the part of a diabetes-related change most worth being deliberate about. How often you test is a question for the team looking after your diabetes, and a new prescription is a good reason to put it to them rather than to answer it yourself in either direction. Ask, and keep a note of what they tell you beside the readings themselves. Whatever pattern you settle on together, write the numbers down with times attached rather than trusting a device history you may not be able to read back easily.
CDC material on low blood sugar sets out what an episode can feel like and why recognising one matters, particularly for people taking medicines that lower glucose. Where a GLP-1 medicine sits alongside insulin or a sulfonylurea, that awareness is not academic. Nothing here tells you whether anything about your other medicines should change, and you should not assume it has or has not; that question belongs to your prescriber. Ask them directly rather than settling it by inference in either direction. What is yours to do is notice, record, and report.
- The reading, the time, and what you had eaten beforehand
- What you felt, in your own words, before you checked
- What you did about it and how long it took to settle
- Whether it fell on a particular day of the week relative to your injection
That last line is the one people leave out and later wish they had kept.
How often to check is something to agree with your care team. If you think your readings have changed, or you are unsure whether to check more often while the prescription is new, ask them, and write down what they tell you next to the readings themselves.
The first month under the new prescription
Give the new stretch its own space in whatever you use, headed with the date of the first Mounjaro injection. Then keep it lightly but consistently for four weeks or so. You are not trying to produce a dataset; you are trying to be able to answer specific questions in six weeks' time without guessing.
MedlinePlus describes digestive effects among those reported with tirzepatide and advises telling a doctor about anything severe or unresolving. Whatever you experienced previously is not the benchmark. Write down which days brought symptoms, how long each lasted, and whether it interfered with eating, work, or sleep. A symptom that lasts an afternoon and one that lasts three days look identical in memory a month later and completely different on paper.
Alongside that, keep noting the mundane things: what you actually ate on a difficult day, whether you drank enough, whether you were travelling or unwell for unrelated reasons. Context is what makes a symptom log interpretable rather than merely alarming.
Carrying it into the review
Take the two stretches with you, unedited. A clinician reviewing a change wants to see the before and the after next to each other, and they will read a dated list quickly. Resist the urge to convert it into a conclusion; the conclusion is their job and the raw material is yours.
One practical note on presentation. If your readings live on a device or an app, check before the appointment that you can actually retrieve the period you want to show, and export or write out the relevant weeks if retrieval is fiddly. Appointments are short, and a screen that will not scroll back far enough is a common way for a good record to go unread.
Bring your medicines list too, revised. FDA recommends keeping a personal list current and sharing it at appointments, and a change of prescription is the most common moment for such a list to fall out of date. Include everything, not only the diabetes medicines: other prescriptions, anything bought over the counter, and supplements.
The boundary, stated plainly
You will not find equivalent amounts, conversion guidance, or a schedule for the changeover anywhere on this page, because those are decisions for the person prescribing and instructions that belong in the leaflet supplied with your medicine. If something you read online conflicts with what you were told, the instruction given for your own treatment stands, and the conflict is worth mentioning rather than settling for yourself.
Seek urgent medical attention for severe abdominal pain, persistent vomiting, an inability to keep fluids down, symptoms of very low blood sugar that do not respond as you have been taught to expect, or signs of a serious allergic reaction. Those situations are not record-keeping problems and should not wait for your next appointment.