Reading Time: mins
If you are preparing for bariatric surgery, you may have been asked to lose some weight beforehand, and you might be wondering whether a weight-loss injection could help you get there. It is a fair question, and an increasingly common one.
For some people it can help, but it needs to be planned carefully with your team, and there are important safety points around the operation itself. As a practice that offers the full range of bariatric surgery and supports patients through every stage, here is how we look at it.
In this article, we cover:

You may be asked to lose some weight before a gastric sleeve or gastric bypass for a practical, physical reason. The liver sits directly over the stomach, and carrying excess weight tends to make it larger and fattier. Losing some weight beforehand shrinks the liver, which gives your surgeon better access and makes the operation safer and more straightforward, whichever procedure you are having. It also helps you settle into the eating habits that will support your recovery afterwards.
Weight-loss injections reduce appetite, which can make it easier to reach a pre-operative target, particularly if diet changes alone have stalled. Used in the months before surgery, they can be a helpful stepping stone towards being in the best possible shape for your procedure, both for the safety of the operation and for how you recover.
Not everyone needs medication before surgery, and it is not right for every patient. Whether it makes sense depends on your starting point, your health, and how your preparation is going. This is a decision your surgeon makes with you, rather than something to start on your own.
This part matters for your safety. Because these medications slow down how quickly the stomach empties, food can remain in the stomach longer than usual. That raises the risk of stomach contents being present during an anaesthetic, so these medications are usually paused for a set period before surgery. Your surgical team will give you clear, specific instructions on when to stop and, if relevant, when you might restart. Please do not adjust the timing yourself, and always tell your surgeon and anaesthetist that you are taking weight-loss medication.
The safest results come when your GP or prescriber and your surgical team are working from the same plan. Through our Ongoing Care Program, we help coordinate that preparation so everyone is on the same page and your lead-up to surgery is as smooth and safe as possible.
Whichever procedure you are considering, and however you plan to prepare, contact our practice online or call us on (02) 9553 1120 to book an appointment with one of our bariatric specialists.

Contact us to discuss symptoms, timing and the best treatment plan for you.

P: 02 9553 1120
F: 02 9553 7526
E: info@uppergisurgery.com.au

Copyright ยฉ 2026. Upper GI Surgery. All rights reserved.