How the weekly schedule works for Wegovy and Mounjaro

Wegovy (semaglutide) and Mounjaro (tirzepatide) are both injected under the skin once a week. The rest of the schedule, which strength you are on and when it changes, is set by your prescriber. This article describes the shape of a weekly schedule in general terms and what the Dose Club app does with it. It gives no figures beyond what the leaflets say, and it never suggests a step.

One injection a week

Each leaflet says the medicine is used once a week, on the same day each week, at any time of day, with or without meals. The pens are sold by strength, and the leaflet lists the strengths that exist for each medicine. You use the pen your prescriber prescribed, at the strength written on it.

Steps at intervals

Both leaflets describe a starting strength that is used for a number of weeks, after which the doctor moves to the next strength, and so on in steps at intervals. The leaflet gives the strengths and the intervals. The Mounjaro leaflet says the doctor may make the later steps if you need them, and both leaflets say to use the medicine exactly as your doctor has told you and to check with your doctor or pharmacist if you are not sure. Your prescriber decides how the schedule applies to you.

The practical consequence is that two people on the same medicine for the same number of weeks can be on different strengths, and neither is ahead or behind. The community rules follow from this: you can describe your own schedule, and you cannot tell another member what theirs should be.

Changing the injection day

Both leaflets say the day of the weekly injection can be changed if necessary, as long as a minimum number of days has passed since the last injection. The leaflet gives that number. If you are thinking of moving your day, for a holiday or a change of routine, the leaflet is the place to read first and the pharmacist or prescriber the person to ask.

What the app records

The Dose Club app is a record of what you did.

• The dose log stores each dose with its date, time, injection site, pen or batch number and a note. The batch number against each dose answers a pharmacy's question about a delivery or a recall without a search through boxes.
• The calendar shows doses, symptoms and weigh-ins by week and by month.
• Reminders are local notifications with generic wording by default, so nothing on a lock screen names a medicine unless you choose that.
• Dose Insights, in Dose Club Plus, report an on-time rate for each dose period: how often the dose was logged on its scheduled day.

Everything the app shows is built from these entries. The level chart estimates the amount of medicine in your system from the doses you logged, and the missed dose screen shows the leaflet's wording for your region, with a link to the leaflet, and no verdict of its own.

What the app never does

It never proposes the next strength or says a step is due, and it never compares one strength with another as better or worse. Those are decisions for you and your prescriber, and the app's job is to make sure you arrive at that conversation with an accurate record. The prescriber PDF in Plus puts the doses, weights, symptoms and insights into one document for the appointment.

Sources

• Wegovy patient information leaflet and Mounjaro patient information leaflet on the electronic medicines compendium: medicines.org.uk/emc
• NHS, treatment for obesity: nhs.uk

This article is information, not medical advice. Talk to your prescriber about your treatment.