1mg Wegovy Compared to Mounjaro: What Are the Differences?

Wegovy and Mounjaro belong to the same broad class of injectable weight-management medicines but have distinct mechanisms. Wegovy's active substance, semaglutide, acts on a single receptor pathway — GLP-1 — which is involved in appetite regulation, the sense of fullness, and the rate at which the stomach empties. Mounjaro's active substance, tirzepatide, acts on two receptor pathways simultaneously: GLP-1 and GIP. Whether that dual action matters for a specific person is a clinical question, not a tracking one.

Wegovy dose stages in context

Wegovy is typically introduced at a low dose and increased gradually by the prescriber. The commonly referenced dose stages are 0.25mg, 0.5mg, 1mg, 1.7mg, and 2.4mg — each representing a step in a structured titration. The 0.25mg stage is usually a starting point, 0.5mg and 1mg are intermediate steps, and 1.7mg and 2.4mg are the higher maintenance levels. Each individual's progression through these stages is guided by their prescriber; no stage should be skipped, extended, or changed without clinical input. You can find factual information about the dose schedule in the electronic Medicines Compendium (eMC), which holds the full prescribing information.

Mounjaro dose stages in context

Mounjaro uses a different scale altogether: commonly referenced strengths are 2.5mg, 5mg, 7.5mg, 10mg, 12.5mg, and 15mg. These numbers are not directly comparable to Wegovy's milligram figures — the two medicines have different active substances and different dosing scales. Seeing "1mg" for Wegovy and "5mg" for Mounjaro does not mean one dose is stronger or larger in a clinically comparable sense.

What they share

Both are once-weekly pre-filled injectable pens, both carry a black triangle (▼) designation indicating they are subject to additional monitoring, and both are prescription-only medicines. Anyone experiencing a side effect on either medicine should report it to their healthcare professional and to their national reporting scheme (such as the UK's Yellow Card scheme).

For a broader overview of how these two medicines compare, see the full Wegovy vs Mounjaro comparison or read more about how Wegovy compares to Mounjaro generally.

GLP Trackr is built for people already prescribed either Mounjaro or Wegovy — and it supports both medicines equally. When you are moving through a titration schedule, whether on Wegovy's 0.25mg, 0.5mg, 1mg, or 1.7mg stages, or progressing through Mounjaro's dose range, the app's dose logging feature lets you record each injection with the exact dose strength, date, and time. That log becomes a clear, timestamped record of where you are in your treatment — useful context to bring to your next prescriber appointment.

Because switching between dose stages can affect how you feel, the side-effect tracker lets you note symptoms like nausea, fatigue, or digestive changes and see whether patterns shift as your dose changes over time. That kind of personal data is far more useful in a conversation with your prescriber than a vague recollection.

For more on how dose stages across the two medicines are structured, the page on Wegovy doses compared to Mounjaro goes into further detail.

Any decision about which medicine to take, which dose to be on, or whether to switch is one for your prescriber — they know your full medical history and circumstances. GLP Trackr records your journey; it does not replace clinical guidance.

Ready to keep a clear record of every dose and how you feel along the way? GLP Trackr is available free on the App Store and Google Play, with a 7-day free trial to get you started.