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Saxenda is an effective weight loss treatment containing the active ingredient liraglutide. It mimics a hormone your body releases after eating a meal. It’s a subcutaneous injection pen you administer just under the skin (not into a vein). You’ll inject it once a day, starting off on a low dose and gradually increasing it over the first five weeks.
Saxenda is suitable for adults with a BMI of 30 or higher, or a BMI of 27 or higher who also have a weight-related health condition (such as type 2 diabetes, high blood pressure, or sleep apnea).
How does Saxenda work?
Saxenda basically works by convincing you that you’re full. The active ingredient in Saxenda mimics the naturally occurring substance in the body that’s released after having a large meal called GLP-1. It interacts with receptors in the brain that relate to appetite, controlling hunger and making you feel fuller. This helps you to eat less, and in turn lose weight.
How well does Saxenda work?
Saxenda has performed well in clinical studies, and proven to be an effective weight loss medication. In one analysis, people using it for four or more months lost 6.3% of body weight, and people using it for six or more months lost 7.1%.[1] A meta-analysis also found that patients using Saxenda in conjunction with diet and physical activity achieved between 5 and 10% weight loss compared with placebo.[2]
As effective as Saxenda has shown to be, it’s important to remember that you’ll need to eat a healthy diet and exercise regularly for it to work at its best.
This page was written by The Treated Content Team.
This page was medically reviewed by Dr Daniel Atkinson on October 25, 2024. Next review due on October 25, 2027.
How we source info.
When we present you with stats, data, opinion or a consensus, we’ll tell you where this came from. And we’ll only present data as clinically reliable if it’s come from a reputable source, such as a state or government-funded health body, a peer-reviewed medical journal, or a recognised analytics or data body. Read more in our editorial policy.
SaxendaLiraglutide
How to use Saxenda
You can inject Saxenda at any time of the day, but try to do it at the same time each day. Choose a time that’s easy to remember (for example, with breakfast). It can be taken with or without food.
Preparation:
Pull off the pen cap and check that the solution in your pen is clear and colorless.
Take a new needle and attach it to the pen (always use a new needle for each injection).
Push the needle on straight and turn it until it’s on tight.
Remove the outer needle cap and keep it. You will need it later. Throw the inner needle cap away.
Check the flow (first use of each new pen only):
You only need to check the flow the first time you use a new pen.
Turn the dose selector to the flow check symbol.
Hold the pen with the needle pointing up. Press and hold the dose button until the dose counter returns to 0. A drop of Saxenda should appear at the needle tip. If no drop appears, repeat up to six times. If there is still no drop, do not use the pen.
Using the pen:
Turn the dose selector to the correct dose prescribed by your doctor.
Insert the needle into your skin (front of your waist, front of your thigh, or upper arm).
Press and hold down the dose button until the dose counter shows 0. You may hear or feel a click.
Keep the dose button pressed and keep the needle in your skin. Count slowly to 6.
Remove the needle from your skin.
After injecting:
Carefully slip the needle tip into the outer needle cap without touching the needle.
Once the needle is covered, carefully push the outer needle cap completely on.
Unscrew the needle and dispose of it carefully in a sharps container.
Put the pen cap back on.
For more detailed instructions, check the patient medication information leaflet that comes with your prescription.
What dose do I use?
You’ll start with the lowest dose, 0.6 mg, which you’ll use for the first week. Each week, the dose will increase by 0.6 mg, as follows:
Week 2 – 1.2 mg
Week 3 – 1.8 mg
Week 4 – 2.4 mg
Week 5 – 3.0 mg
Once you reach week 5, you’ll continue to use the 3.0 mg maintenance dose until the end of your treatment. Your healthcare provider will monitor your progress.
How long does one pen last?
It depends on which stage of dosing you’re at. One pen contains 18 mg of liraglutide.
Your first pen will last 17 days.
Your second pen will last 8 days.
Once you are on the 3.0 mg maintenance dose, each
subsequent pen will last 6 days.
What if I take too much Saxenda?
If you take too much Saxenda, contact your doctor or go to the nearest emergency department immediately. You might experience nausea, vomiting, or hypoglycemia (low blood sugar).
What to do about Saxenda missed doses
If you miss a dose and it’s been less than 12 hours since you usually take it, inject it as soon as you remember. If it’s been more than 12 hours, skip the missed dose and take your next dose at your regularly scheduled time.
Never take a double dose of Saxenda to make up for a missed one.
This page was written by The Treated Content Team.
This page was medically reviewed by Dr Daniel Atkinson on October 25, 2024. Next review due on October 25, 2027.
How we source info.
When we present you with stats, data, opinion or a consensus, we’ll tell you where this came from. And we’ll only present data as clinically reliable if it’s come from a reputable source, such as a state or government-funded health body, a peer-reviewed medical journal, or a recognised analytics or data body. Read more in our editorial policy.
SaxendaLiraglutide
Saxenda isn’t suitable for everyone, and there are some things you need to be aware of before you take it.
Here’s all the official info. If you’re unsure about anything, send us a message and we’ll get back to you.
Before you use Saxenda, you should always read the package leaflet.
SaxendaLiraglutide
Saxenda: FAQ
Have something specific you want to know? Search our info below, or ask our experts a question if you can’t find what you’re looking for.
Saxenda and alcohol
Answer:
There are no known direct contradictions between Saxenda and alcohol, but your doctor will likely recommend limiting your alcohol intake. Drinking alcohol might worsen side effects like nausea. Additionally, alcoholic drinks are often high in calories, which can affect your weight loss results.
Can you get side effects with Saxenda?
Answer:
Yes, you might experience some side effects when taking Saxenda. The most common side effects include:
Nausea
Vomiting
Diarrhea
Tiredness
Constipation
Headache
These side effects are often mildest and most common when starting the medication or increasing the dose, and they should lessen as your body adjusts. If they persist or are bothersome, let your doctor know.
Can I take Orlistat with Saxenda?
Answer:
Although there are no known direct interactions, it’s generally not recommended to take two different prescription weight loss medications at the same time. If you’re unsure about which treatment to choose, studies have shown that Saxenda is more effective than Orlistat,[2] but the best choice depends on a variety of factors, including your medical history and personal needs.
Is Saxenda the same as Ozempic?
Answer:
No. While both are made by the same company and are in the same class of drugs, Saxenda is approved for weight management and Ozempic is approved for type 2 diabetes management. They contain different active ingredients: Saxenda contains liraglutide, and Ozempic contains semaglutide.
How long does Saxenda take to work?
Answer:
You might start to see results in as little as 4 weeks.[3] Generally, your progress will be evaluated after 12 weeks on the full 3.0 mg dose. If you haven't lost at least 5% of your initial body weight by then, your healthcare provider may recommend that you stop the treatment.
Is there a meal plan I should follow when taking Saxenda?
Answer:
You don’t need to follow a specific, branded diet plan, but a healthy, reduced-calorie diet alongside regular exercise will produce the best weight loss results. It’s generally recommended to aim for a calorie deficit of about 500 calories per day to lose approximately one pound (0.5 kg) per week. You should also aim for at least 150 minutes of moderate physical activity each week.
Is there a generic version of Saxenda?
Answer:
No, currently there is no generic version of Saxenda available in Canada. It is only available under the brand name Saxenda.
Can you get Saxenda without a prescription?
Answer:
No. Saxenda is a prescription-only medicine in Canada, so you can’t get it over the counter.This is so your doctor can check it's safe and suitable for you to use.
Our experts continually monitor new findings in health and medicine, and we update our articles when new info becomes available.
Why this page was updated on Jul 29, 2025
Content checked and updated as part of our 3-yearly periodic review, to ensure accuracy and currentness.
Current version (Jul 29, 2025)
Edited by: The Treated Content Team.Medically reviewed by: Dr Daniel Atkinson, GP Clinical lead
Aug 01, 2022
Published by: The Treated Content Team.Medically reviewed by: Dr Daniel Atkinson, GP Clinical lead
How we source info.
When we present you with stats, data, opinion or a consensus, we’ll tell you where this came from. And we’ll only present data as clinically reliable if it’s come from a reputable source, such as a state or government-funded health body, a peer-reviewed medical journal, or a recognised analytics or data body. Read more in our editorial policy.
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Dr Daniel Atkinson
GP Clinical lead
Dr Daniel is our Lead Doctor, based in the UK. He doesn’t prescribe for our Canadian patients, but often reviews medical content across the site to make sure it's clinically accurate. On specific pages he's reviewed you'll see his reviewer card.
When we present you with stats, data, opinion or a consensus, we’ll tell you where this came from. And we’ll only present data as clinically reliable if it’s come from a reputable source, such as a state or government-funded health body, a peer-reviewed medical journal, or a recognised analytics or data body. Read more in our editorial policy.
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All of our reviews are collected from real patients after their treatment has been delivered.
We publish reviews collected through independent platforms including Reviews.io and Trustpilot.