Ozempic is semaglutide, given as a weekly injection from a pen device, and licensed for type 2 diabetes. The same active ingredient is sold as Wegovy and as Rybelsus, a tablet taken differently. Because Ozempic is dosed weekly from a pen that is used more than once, a simple personal record of how many injections you have taken from your current pen can save you from an unwelcome surprise, such as reaching for the pen on injection day and finding it is already finished.

This article will not tell you how many doses your particular pen contains, because that depends on your prescribed pen and product, and the details are set out on your own packaging and in the patient information leaflet that comes with it. What it can offer is a practical way to keep your own count, so that whatever the actual number is for your pen, you always know where you stand.

A simple way to log each injection against your pen

  • Note the date you start a new pen, and give the pen itself a short label such as a number or the start date
  • Each time you inject, add a line: date, pen label, and the site used
  • Keep this list in one place, whether that is a notebook, a spreadsheet, or a tracking app, rather than spread across memory and scraps of paper
  • When you finish a pen, mark the date it was finished next to the date it was started
  • If your pharmacy label or leaflet states a maximum number of doses for your pen, note that figure alongside your log so you have both the rule and your own running count in one place

Over time, this builds a clear picture of how long a pen actually lasts you in practice, which is useful for planning rather than for anything clinical. It also gives you an easy way to double check, at a glance, roughly how many injections you should have left before you need to open a new one.

Anticipating when you will need a new pen

Once you have logged a couple of pens from start to finish, you will have a personal sense of your own pattern. Use that pattern to plan ahead for prescription renewals and pharmacy collection, rather than waiting until a pen runs out to realise you need a new one. Building in a small buffer, so you request a renewal before you are down to your last injection or two, avoids gaps in your weekly routine, and avoids the stress of trying to arrange an urgent pharmacy collection around a scheduled injection day.

This kind of forward planning matters more for a weekly medicine than it might for something taken daily from a large supply, simply because the gap between doses is long enough that a single missed pickup can genuinely affect your schedule.

Questions this record cannot answer

Your log tells you what you have used and when. It does not tell you how to use the device, how much medicine remains part-way through a pen if that is unclear to you, or what to do if a pen seems to be behaving unexpectedly. For any of these questions, contact your pharmacist or the number provided with your device rather than guessing. Getting device-specific guidance from the people who supplied your medicine is safer than relying on general advice, since pens and instructions can vary between products and countries, and even between different versions of the same product over time.

A simple habit worth building alongside your dose count is checking the pen itself before each injection, looking for anything that seems different from usual, such as the appearance of the liquid inside if it is visible, or the way the device responds when you prepare it. If anything looks unusual, note what you saw and contact your pharmacist before using it, rather than relying on your dose count alone to judge whether the pen is fine.

Over several months, your pen log can also become a useful record in its own right, separate from your weekly injection diary, showing exactly how many pens you have used, when each one started and finished, and whether your usage has stayed consistent. That kind of longer view is easy to lose track of from memory, but simple to see at a glance in a well-kept record.