Saxenda versus Wegovy: What Are the Differences?

Both medicines belong to the GLP-1 receptor agonist class, meaning they act on pathways involved in appetite regulation and the feeling of fullness. Beyond that shared mechanism, there are meaningful factual differences worth understanding.

Active substance and mechanism

• Saxenda contains liraglutide, a GLP-1 receptor agonist. It is injected once daily.
• Wegovy contains semaglutide, also a GLP-1 receptor agonist, but formulated at a higher dose than the earlier semaglutide product Ozempic. It is injected once weekly.

Dosing schedule

Saxenda uses a daily injection schedule with a gradual dose escalation typically guided by the prescriber over several weeks. Wegovy follows a once-weekly injection schedule, also with a prescriber-led escalation phase. Neither schedule should be adjusted without guidance from your prescriber or doctor.

How they are supplied

Both medicines are supplied as pre-filled injection pens. The specific pen devices, needle sizes, and storage requirements differ between the two — always refer to the patient information leaflet that came with your pen, or check the electronic Medicines Compendium entry for your specific product, for accurate handling details.

Reported side-effect profiles

Because both are GLP-1 receptor agonists, the commonly reported side effects overlap considerably: nausea, vomiting, diarrhoea, constipation, and injection-site reactions are documented for both. The frequency and intensity can vary between individuals and between medicines. If you are experiencing side effects that are severe, persistent, or worrying, contact your healthcare professional promptly. Any side effect worth noting can also be reported to your national pharmacovigilance scheme (such as the UK's Yellow Card scheme or the equivalent in your country).

For a broader look at how Wegovy compares with another once-weekly injectable, see Wegovy vs Mounjaro: an informational comparison or read about side-effect differences between Wegovy and Mounjaro. If you are specifically researching semaglutide products, our page on Ozempic versus Wegovy covers the distinctions between those two.

GLP Trackr is built for people already on a GLP-1 medicine — whether that is a daily injection like Saxenda or a weekly one like Wegovy. The app is medicine-agnostic: it adapts to your schedule rather than assuming a fixed frequency.

Because Saxenda involves a daily injection routine, the injection-site tracking and rotation feature is particularly useful — you can log each site (abdomen, thigh, upper arm), and the app keeps a rotation history so you are not repeatedly using the same area. For weekly injectors on Wegovy, the same feature helps maintain a sensible rotation across fewer but still important injection events.

The dose reminder function adjusts to whatever cadence you are on, so whether you inject every day or once a week, a gentle prompt means you are less likely to miss a scheduled dose. If you do miss one, the app lets you log it so you have an accurate record to discuss with your prescriber — dose decisions always belong with them, not with an app.

Tracking your journey on either medicine also means logging how you feel over time. GLP Trackr's side-effect and daily check-in tools let you note nausea, energy levels, mood, and other patterns across days and weeks — the kind of detailed picture that can make a real difference when you bring it to a prescriber appointment. You can explore how the Wegovy-versus-Mounjaro comparison sits within the broader GLP-1 landscape on the Wegovy vs Mounjaro hub, or read more about how tirzepatide and semaglutide differ.

GLP Trackr is free to try for 7 days and available on the App Store and Google Play. Download it, log your first injection, and start building the kind of consistent record that supports a productive conversation with your healthcare team.