Saxenda Injections: Complete Guide to Liraglutide for Weight Loss
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Explore Weight Loss Treatments →What Is Saxenda?
Saxenda is a prescription-only weight loss injection containing liraglutide 3mg — an MHRA and FDA-approved medication specifically licensed for chronic weight management in adults. It belongs to the class of GLP-1 receptor agonists, which mimic a naturally occurring gut hormone to reduce appetite and slow gastric emptying.
It is given once daily via a pre-filled pen injection and is intended as part of a comprehensive weight management plan — alongside a calorie-controlled diet and increased physical activity. For an overview of all prescription options, see: What is weight loss medication?
MHRA & FDA approved: Saxenda (liraglutide 3mg) has dual regulatory approval for chronic weight management — one of the most rigorously evaluated prescription weight loss treatments available in the UK.
How Saxenda Works
Saxenda contains liraglutide — a synthetic version of GLP-1 (glucagon-like peptide-1), a hormone released by the gut after eating that signals satiety to the brain. When injected daily, liraglutide activates GLP-1 receptors in the hypothalamus, reduces the rate at which the stomach empties, and stabilises blood sugar by stimulating insulin and suppressing glucagon. The result: most users feel full faster, are satisfied on smaller meals, and snack less — creating a natural, sustained calorie deficit without extreme hunger. Read more: What is liraglutide?
Appetite Suppression
Activates GLP-1 receptors in the brain’s hypothalamus — reducing hunger and extending the feeling of fullness after meals.
Slower Gastric Emptying
Food leaves the stomach more slowly, prolonging satiety and naturally reducing the frequency of hunger between meals.
Blood Sugar Stabilisation
Stimulates insulin and suppresses glucagon — smoothing blood sugar fluctuations that drive cravings and energy crashes.
Sustained Calorie Deficit
Consistent reduction in appetite facilitates the calorie deficit required for progressive, sustained weight loss over months.
How to Use Saxenda Injections
Saxenda comes as a pre-filled pen containing 18mg liraglutide in 3ml solution. Inject subcutaneously (under the skin) once daily into the abdomen, upper thigh, or upper arm. Rotate injection sites to prevent skin reactions. The dose is increased gradually over five weeks to minimise gastrointestinal side effects:
| Week | Daily Dose | Purpose |
|---|---|---|
| Week 1 | 0.6mg | Starting dose — allows body to adjust, minimises early side effects |
| Week 2 | 1.2mg | Appetite suppression begins to become noticeable |
| Week 3 | 1.8mg | Continued escalation |
| Week 4 | 2.4mg | Approaching full maintenance dose |
| Week 5+ | 3.0mg | Maintenance dose — maximum therapeutic effect |
Missed dose: Inject as soon as you remember, provided your next scheduled dose is more than 12 hours away. If under 12 hours, skip the missed dose and continue your regular schedule. Never inject two doses on the same day.
What Results Can You Expect?
Results are best when Saxenda is combined with a calorie-reduced diet and regular physical activity. If you have not lost at least 5% of your starting weight after 12 weeks at the 3mg maintenance dose, your prescriber will review whether to continue treatment. This is especially relevant for those addressing post-lockdown weight gain.
Side Effects of Saxenda
| Side Effect | Frequency | Notes |
|---|---|---|
| Nausea | Very common (>10%) | Most pronounced during dose escalation. Usually reduces significantly after 4–8 weeks at stable dose. |
| Diarrhoea | Very common (>10%) | Typically transient. Adequate hydration helps. |
| Constipation | Common (1–10%) | Increased fibre and fluid intake usually resolves. |
| Vomiting | Common (1–10%) | More likely at each dose increase. Eating smaller meals reduces risk. |
| Headache / fatigue | Common (1–10%) | Often related to reduced calorie intake. Usually temporary. |
| Injection site reactions | Common (1–10%) | Redness or bruising. Rotating sites reduces frequency. |
Seek immediate medical attention for: severe, persistent abdominal pain (possible pancreatitis); signs of allergic reaction (facial swelling, difficulty breathing, widespread rash). Stop Saxenda and contact your GP or call 999 if concerned.
Who Is Saxenda Suitable For?
Saxenda is appropriate for adults aged 18+ meeting these criteria:
- BMI of 30 or above (classified as obese), or
- BMI of 27 or above with at least one weight-related condition (type 2 diabetes, hypertension, or high cholesterol)
- Committed to using Saxenda alongside a calorie-controlled diet and increased physical activity
Not suitable if you are: pregnant or breastfeeding; have a personal or family history of medullary thyroid carcinoma or MEN2 syndrome; have a history of pancreatitis; or are taking other GLP-1 receptor agonists or injectable diabetes medications.
How to Get Saxenda in the UK
Saxenda is prescription-only. Access Doctor is a GPhC-registered online pharmacy. Complete a short medical questionnaire reviewed by our GPhC-registered pharmacist independent prescribers. If approved and eligible, your Saxenda is dispatched in discreet packaging — typically arriving via Royal Mail Tracked 24 the next working day for orders placed before 3pm.
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MHRA-approved prescription treatments including Saxenda (liraglutide). Online consultation reviewed by GPhC-registered pharmacist independent prescribers. Discreet next-day delivery.
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Short online medical questionnaire — reviewed by GPhC-registered pharmacist independent prescribers. Discreet next-day delivery if approved.
Explore Weight Loss Treatments →Medical disclaimer: This article is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional before starting any weight loss medication. Prescription weight loss treatments are only suitable for appropriate candidates — a full medical consultation is required. In a medical emergency, call 999.
Frequently Asked Questions About Saxenda
What are Saxenda injections?
Saxenda is a prescription-only daily injection containing liraglutide 3mg — a GLP-1 receptor agonist that mimics the gut hormone signalling fullness to the brain. MHRA-approved for chronic weight management in adults with BMI 30+ or 27+ with a weight-related condition, alongside diet and exercise.
How do you inject Saxenda?
Once daily via a pre-filled pen into the abdomen, thigh, or upper arm. The dose starts at 0.6mg and increases weekly over 5 weeks to the 3mg maintenance dose. Rotate injection sites. Full instructions are provided with the pen. See also: What is liraglutide?
How much weight can you lose with Saxenda?
Clinical trials showed an average of 8–9% body weight loss over 56 weeks when combined with diet and exercise. Around 60% of users lost at least 5% of body weight, and over 30% lost 10% or more. Individual results vary.
What are the side effects of Saxenda?
Most common side effects are gastrointestinal — nausea, diarrhoea, constipation, vomiting — mainly during dose escalation and usually improving over time. Rare but serious: pancreatitis. Seek immediate medical help for severe, persistent abdominal pain.
Who is Saxenda suitable for?
Adults aged 18+ with BMI 30+ or 27+ with a weight-related condition. Not suitable during pregnancy or breastfeeding, or with history of thyroid cancer, pancreatitis, or current use of other GLP-1 medications. Full consultation required.
Can I get Saxenda online in the UK?
Yes. Access Doctor is a GPhC-registered online pharmacy. Complete a short consultation reviewed by GPhC-registered pharmacist independent prescribers. If you meet the clinical criteria, Saxenda is dispatched for next-day delivery in discreet packaging.
References
- NICE. Liraglutide for managing overweight and obesity (TA664). National Institute for Health and Care Excellence, 2020. Available at: nice.org.uk/guidance/ta664
- Pi-Sunyer X, et al. A randomized, controlled trial of 3.0 mg of liraglutide in weight management. NEJM. 2015;373:11–22. Available at: pubmed.ncbi.nlm.nih.gov/26132939
- Electronic Medicines Compendium. Saxenda 6mg/ml solution for injection — SmPC. Available at: medicines.org.uk/emc
- NHS. Obesity — Treatment. Available at: nhs.uk/conditions/obesity/treatment
- NICE. Obesity: identification, assessment and management (CG189). Available at: nice.org.uk/guidance/cg189