Getting Started

What to Expect in Your First Month on GLP-1

1 April 2026·6 min read

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What to Expect in Your First Month on GLP-1

Starting a GLP-1 medication like Ozempic, Wegovy, or Mounjaro is a significant step. Here's what the first four weeks actually look like, based on real experiences and clinical data.

Week 1: The Adjustment Period

Most people start on the lowest dose (typically 0.25mg for semaglutide). You may experience:

  • Nausea — usually mild, peaks around day 3-4
  • Reduced appetite — this is the medication working
  • Fatigue — your body is adapting to lower blood sugar

Week 2: Finding Your Rhythm

Side effects typically begin to ease. You'll notice:

  • Smaller portions feel satisfying
  • Fewer food cravings
  • More consistent energy levels

Week 3-4: The New Normal

By now, your body has adjusted to the medication. Focus on:

  • Protein intake (aim for 60-80g daily minimum)
  • Hydration (2-3 litres daily)
  • Movement (walking counts)

Common Questions

How much weight will I lose? Most people lose 1-3% of body weight in the first month. This is healthy and sustainable.

When do I increase the dose? Typically every 4 weeks, following your prescriber's protocol.

Bottom Line

The first month is about adjustment, not dramatic results. Trust the process, manage side effects, and build habits that will sustain you long-term.

Free resource

The UK Patient's Guide to GLP-1 Medications

Evidence-based information about Ozempic, Wegovy, Mounjaro, and other GLP-1 medications. Understand what they do, side effects, costs, and where to access them in the UK.

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