If you’re starting your weight loss journey and wondering how long does it take to lose a stone, you’re not alone. At Sudbury Court Pharmacy, we meet many patients who are eager to lose weight safely and steadily—but who also want to set realistic expectations, especially when considering medications like Mounjaro or Wegovy.

These innovative weight loss injections are transforming the way people lose weight, especially for those who have struggled with traditional diet and exercise alone. However, it’s important to understand what they can offer, how quickly you might see results, and why pharmacy-led support plays such a vital role in long-term success.

How Much Is a Stone?

Let’s start with the basics. In the UK, one stone is equivalent to 14 pounds or 6.35 kilograms. Losing a stone is a common goal for many, especially those who are overweight or living with obesity. It often marks a significant improvement in how people feel physically and mentally—and can even start to reduce the risks of related health conditions.

How Mounjaro and Wegovy Work

Both Mounjaro (tirzepatide) and Wegovy (semaglutide) belong to a class of medications known as GLP-1 receptor agonists. Mounjaro also targets GIP receptors, giving it a dual mechanism of action.

These medications help by:

• –> Suppressing appetite

• –> Improving blood sugar control

• –> Increasing feelings of fullness

• –> Reducing cravings and emotional eating

As a result, patients typically reduce their overall calorie intake without feeling deprived—making it much easier to maintain consistency.

How Long Does It Take to Lose a Stone on Mounjaro or Wegovy?

Weight loss isn’t instant, and it’s never completely predictable. However, we can offer guidance based on clinical trials and real-world experience from our patients.

In clinical studies Wegovy users typically lost around 12% to 15% of their body weight over 68 weeks (approximately 1.25 years. Meanwhile, Mounjaro users lost an average of 15% to 22% of their body weight over a similar timeframe.

This means a person weighing 14 stone (196 lbs) may lose around 1–2 lbs per week in the early stages. Losing a full stone could take around 6–10 weeks, depending on their starting weight, adherence, and other lifestyle factors

Keep in mind that early weight loss may be quicker, especially in the first 4–6 weeks, when appetite suppression is strongest and dietary changes are most noticeable. However, as your body adapts, the rate of loss may slow—which is perfectly normal.

Why Everyone’s Timeline Is Different

There are several reasons your experience may vary:

Starting weight – Those with a higher BMI often see faster early results

Metabolism and hormones – Age, thyroid function, and genetics all play a role

Diet and exercise – The more you pair the medication with healthy habits, the better your results

Dosage titration – Mounjaro and Wegovy are started at low doses to minimise side effects, which can slow early progress

That’s why we always recommend ongoing pharmacy support—not just a one-off prescription.

How Our Pharmacy Supports Your Weight Loss Journey

At Sudbury Court Pharmacy, we offer a private, medically supervised weight loss service that ensures your treatment is safe, effective, and personalised.

Our support includes:

• –> Initial consultation to assess suitability for Mounjaro or Wegovy

• –> Regular reviews to track your progress, adjust dosage, and offer guidance

• –> Advice on nutrition and activity, including tips for managing side effects

• –> Motivational support, helping you stay accountable through plateaus or setbacks

We’re not here just to dispense medication. We’re your partner in long-term weight management—and that includes honest conversations about what to expect and how to improve your outcomes.

How to Speed Up Progress Safely

While you shouldn’t rush the process, there are a few ways to maximise your weight loss while on medication:

• –> Eat balanced, nutritious meals with high protein, fibre, and healthy fats

• –> Stay hydrated, as dehydration can impact metabolism and energy

• –> Incorporate regular activity—even light walking or chair exercises make a difference

• –> Track your progress using a weight loss journal or digital app

• –> Stick to your medication schedule and communicate any side effects

Consistency, not perfection, is what leads to long-term change.

What Results Can I Expect?

So, how long does it take to lose a stone on Mounjaro or Wegovy? While results vary, most people can expect to reach that goal in six to ten weeks with the right support, especially when combining medication with lifestyle changes.

At Sudbury Court Pharmacy, we’re here to help you do just that. Our weight loss services are designed to give you safe, structured, and supportive access to these groundbreaking treatments—so you’re never left to navigate the journey alone. Reach out today.

Book your consultation with us today and let’s take the first step together toward a healthier, more confident you.

This blog was written on behalf of Sudbury Court Pharmacy and Travel Clinic by Pharmacy Mentor.