Wegovy Pill vs Mounjaro: How Do They Compare?

If you’ve been researching medicated weight loss programmes, it’s likely that you have heard of Mounjaro. Containing the active ingredient tirzepatide, it has been clinically proven to help you lose weight when taken alongside positive lifestyle changes, such as a healthy diet and increased physical activity. Although it can be highly effective, the treatment involves self-administering an injection under the skin (subcutaneously) every week, something which may be an uncomfortable thought for some people.

While weight loss tablets were an alternative, they didn’t offer the same potential results as Mounjaro or other injections, as they typically worked in different ways. This changed in June 2026, when the UK’s first GLP-1 pill for weight management was approved by the Medicines and Healthcare products Regulatory Agency (MHRA). Known as the Wegovy pill, this medication offers a real alternative if you may have been put off by the idea of using injections.

But how exactly does this tablet compare against tirzepatide (Mounjaro), and which option could be best for you? Join us as we compare the Wegovy pill vs Mounjaro, and cover key topics such as how the treatments work, the dosage schedule, potential results, and much more. Let’s begin.  

What are the Wegovy Pill and Mounjaro Injections?

Both the Wegovy pill and Mounjaro injections are licensed weight loss treatments. The Wegovy pill is a daily oral medication containing semaglutide, while Mounjaro is a weekly injection containing tirzepatide. They are both suitable for adults with obesity or overweight-related health conditions, but they contain different active ingredients and are administered differently.

The Wegovy pill is one of the latest weight loss treatments to be approved in the UK, receiving its license from the MHRA in June 2026. The Wegovy tablet contains the same active ingredient as injectable Wegovy, a glucagon-like peptide-1 receptor agonist. However, unlike the injections, the pills are taken orally once daily.

Mounjaro, meanwhile, contains the active ingredient tirzepatide, which acts on two receptors, GLP-1 and GIP, so it is known as a dual GIP and GLP-1 receptor agonist. It is administered as a once-weekly injection using a prefilled pen.

The treatments are intended to be used long-term alongside a reduced-calorie diet and increased physical activity to support significant weight loss. 

How Do Wegovy Pills and Mounjaro Work?

Both Wegovy pills and Mounjaro help people lose weight by reducing appetite and helping them feel fuller for longer. However, Wegovy works by mimicking one hormone involved in appetite regulation, while Mounjaro targets two hormones, which may contribute to greater weight loss in some people.

The Wegovy pill contains semaglutide, which mimics glucagon-like peptide-1 (GLP-1), a hormone naturally released after eating. This helps slow stomach emptying, reduce hunger signals, increase feelings of fullness, and lower calorie intake. Because semaglutide is a large peptide that is usually broken down in the stomach, researchers have had to develop a way to ensure it can travel through the digestive system without being destroyed by your stomach acid and digestive enzymes. The solution is a special coating called salcaprozate sodium, or SNAC for short. SNAC protects the active ingredient in the Wegovy pill from harsh digestive conditions by temporarily altering the stomach environment, allowing semaglutide to pass through the stomach lining and into the bloodstream.

Mounjaro contains tirzepatide, which activates both GLP-1 and glucose-dependent insulinotropic polypeptide (GIP) receptors. By targeting two metabolic pathways, Mounjaro may have a greater effect on appetite regulation and weight loss than GLP-1-only treatments. Because Mounjaro is injected, its active ingredient does not come into contact with the digestive system, so it is absorbed into the bloodstream and transported to the GLP-1 and GIP receptors in the brain. 

Both medicines also help improve blood sugar control, which can be particularly beneficial for people with type 2 diabetes or insulin resistance.

How Do You Take the Treatments?

How you take the Wegovy pill and Mounjaro is one of the key differences between the medicines. The Wegovy pill is taken once daily as a tablet, while Mounjaro is administered once weekly as an injection under the skin. The main reasons for choosing one over the other are convenience and personal preference.

How To Take The Wegovy Pill

There are several strict steps you must follow when taking the Wegovy pill to ensure it is effectively absorbed. When taking the Wegovy pill, you must:

1. Take it on an empty stomach after a recommended 8 hours of fasting. Most people find that first thing in the morning is the easiest and most appropriate time to take it. You should take it around the same time every day.
2. Swallow the pill whole with no more than 120 ml of water; no other drinks. You must also avoid chewing, crushing, or splitting the tablet.
3. After taking the pill, you must wait at least 30 minutes before eating, drinking or taking any other oral medications. If you do not wait this time, the Wegovy pill may not be properly absorbed

How To Take Mounjaro

Mounjaro is a once-weekly injection that should be injected on the same day every week. It can be used at any time of the day, with or without meals. Mounjaro can be injected into your abdomen, thigh or upper arm. Read our guide for more detailed instructions about how to inject Mounjaro.

For people who dislike needles, the Wegovy pill may offer a more appealing option. However, some people may find remembering a daily tablet less convenient than a once-weekly injection.

Mounjaro

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• Approved Weight Loss Treatment
• Suitable for adults with a BMI of +30kg/m²
• Pre-filled injection pen

• Discreet delivery next working day
• Online prescription - No doctor visit

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Wegovy Pill vs Mounjaro Injection: Which is More Effective?

Current evidence suggests that Mounjaro produces greater average weight loss results than the Wegovy pill. However, both treatments can be highly effective when combined with a healthy lifestyle, and individual results can vary depending on factors such as dosage, adherence, and overall health. For many people, choosing between Mounjaro and the Wegovy pill comes down to preference rather than effectiveness.

The latest clinical trial involving oral semaglutide (Wegovy pill) is the OASIS 4 trial, which has shown that the highest available dose of 25 mg per day resulted in an average body weight loss of 16.6% over 64 weeks.

Secondary analysis of the OASIS 4 trial revealed that, by week 64, people described as early responders achieved an average weight loss of 21.5%. These were individuals who lost to% or more of their body weight by week 16.

These results are closer to Mounjaro's effectiveness, with an average weight loss of 22.5% at the maximum maintenance dose of 15 mg per week over 72 weeks. However, further studies have shown that after 88 weeks, the average weight loss with tirzepatide was 26%.

That said, effectiveness is only one factor. Some people may achieve better long-term results with a treatment they find easier and more comfortable to use consistently.

Wegovy Pill vs Mounjaro Dosage Information

Because the Wegovy pill and Mounjaro injection contain different active ingredients, they are available in different strengths. However, they both use gradual dose increases to help minimise the risk of side effects and allow your body time to adjust to the medication, but these differ because one is a tablet and the other is a weekly injection.

The Wegovy pill starts at a low dose and is gradually titrated every month (30 days) until you reach the maximum maintenance dose, typically within 4 months. The Wegovy pill dosage schedule is:

If you are already familiar with weight loss treatment doses, the maximum Wegovy pill dose may seem high, and there’s a reason for that. Because the Wegovy pill is an oral treatment which is vulnerable to the digestive process, its bioavailability is low. That is how much of the active ingredient is actually absorbed into the bloodstream and available to use. The bioavailability of the Wegovy tablet is only 1-2%.

The Mounjaro dosing schedule is similar to the Wegovy pill, as it is gradually titrated over several months, with the dose typically increasing every 4 weeks. The Mounjaro dosage schedule is:

For some people, it may be advisable to remain on a lower dose for longer, especially if they experience side effects. So, whether you are taking the Wegovy pill or Mounjaro, a clinician will determine the most appropriate dose escalation schedule based on your individual response and tolerability. 

Wegovy Pill vs Mounjaro Injection Side Effects

The Wegovy pill and Mounjaro share many side effects. For both, the most common adverse effects are gastrointestinal (GI)-related, such as nausea, vomiting, diarrhoea, and constipation. For most people, Wegovy pill or Mounjaro side effects are most prominent when they first begin treatment and at every dose increase, but they are usually mild and improve as your body gets used to the medication.

In the OASIS 4 trial, 74% of people reported at least one GI side effect, while in the SURMOUNT-1 trial, gastrointestinal effects were the most commonly reported among people receiving tirzepatide, with up to 82% experiencing at least one Mounjaro side effect. 

Wegovy Pill vs Mounjaro Side Effects Compared

The table below compares some of the potential side effects of the Wegovy pill and Mounjaro.

Please note that the above is not an exhaustive list of possible side effects of the Wegovy pill and Mounjaro. More information can be found in the Wegovy tablets Patient Information Leaflet and the Mounjaro Patient Information Leaflet, respectively. 

One of the key differences between the Wegovy pill and Mounjaro injection, when considering side effects, is that the Wegovy pill does not cause injection site reactions.

If you experience any Wegovy pill or Mounjaro side effects that concern you or are difficult to manage, speak with your doctor. They may suggest lowering your dose, remaining on a lower dose longer, or considering an alternative weight loss treatment.

Is the Wegovy Pill Cheaper than Mounjaro?

The actual cost of the Wegovy pill in the UK has not yet been released, so it is difficult to provide a direct comparison with Mounjaro's price. However, the price is expected to be similar to that of weight loss injections, and we do not expect it to be more expensive than Mounjaro.

Some of the factors that could influence the cost of the Wegovy pill include:

• Manufacturing costs
• Supply and demand
• Dosage strength
• Pharmacy dispensing fees
• Prescriber consultation costs

The cost of the Wegovy pill will become clear closer to launch. 

Can I Switch from Mounjaro to the Wegovy Pill?

Yes, it is possible to switch from Mounjaro to the Wegovy pill, as long as the switch is made under a clinician's guidance. You must not switch on your own. Because Mounjaro and Wegovy contain different active ingredients and work in slightly different ways to support weight loss, there is no direct dose conversion.

The table below gives you an idea of what your starting dose of the Wegovy pill could be with Prescription Doctor. 

When you switch from Mounjaro to the Wegovy pill, there will be a 7-day washout period. This means that you must wait 7 days between your final Mounjaro dose and your first Wegovy pill to avoid overlapping side effects.

If you are thinking about switching from Mounjaro to the Wegovy pill, our clinician can help. You’ll need to have a short online consultation that includes a medical questionnaire so our clinicians can ensure switching is possible for you and that the Wegovy pill is a safe treatment for you.

Where Can I Buy the Treatments?

Mounjaro can be purchased via a private prescription from a reputable pharmacy, such as Prescription Doctor, following a consultation to determine whether the treatment is suitable for you. It is also available on the NHS; however, this approach is subject to much stricter criteria and may involve a long waiting list.

Mounjaro

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• Approved Weight Loss Treatment
• Suitable for adults with a BMI of +30kg/m²
• Pre-filled injection pen

• Discreet delivery next working day
• Online prescription - No doctor visit

Prices from £169.99 Review More Prices

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Wegovy pills, on the other hand, are not currently available in the UK. This is because newly approved medications generally take a little while to reach the market after regulators give the green light. 

Wegovy Tablets vs Mounjaro: Which is Best?

Because everyone’s weight loss journey is different, exactly which of the two treatments will benefit you the most depends on your own personal circumstances. You may not like the idea of injecting yourself and would feel more comfortable taking a tablet. On the other hand, the fasting requirements for the Wegovy pill may not fit around your schedule. It is entirely up to you and what you feel you can work with.

Other variables include how your body interacts with the medication and whether you can tolerate the potential side effects. You may even be taking other treatments that could interact with Mounjaro or the Wegovy pill. Potential results could even be a factor, with tirzepatide offering a slightly higher average weight loss than Wegovy tablets. A lot of thought is required to determine which option you should choose.

If you’re ever unsure, it’s recommended to speak to an experienced clinician who can help you consider what you want from your weight loss programme and what your preferences are. This will enable you to make a more informed and well-rounded decision. 

With You For The Journey 

Starting a medicated weight loss programme is an important decision. It takes hard work and dedication to achieve success, as you will need to commit to making more positive lifestyle choices. The good news is, however, that you won’t need to go through it alone, as Prescription Doctor is here to help.

Since 2013, we have cultivated a strong reputation for the quality of our service and support. We have helped countless individuals just like you to achieve their goals, thanks to an approach that places your requirements at the forefront of everything we do.

Our process begins with a brief online questionnaire to understand your medical history and any other treatments you may be taking. This is then reviewed by our experienced clinicians to determine whether your chosen medication is suitable for your circumstances or if an alternative may be better. Approved orders are then dispatched by our General Pharmaceutical Council-registered pharmacy in plain packaging to your chosen UK address.

The service doesn’t just stop there either, as our clinicians will regularly check in with you to monitor progress and ensure everything is working as it should. You can also get in touch at any time if you have any queries about your treatment programme. We are here to help you succeed.

Think you’re ready to take the first step? Find out more about the Wegovy pills or start a consultation with Prescription Doctor today. 

Authored By

Leanne Edermaniger

Medical Content Writer

Leanne is a science and health content writer focusing on human health and biology while utilising her solid academic background.

Published on: 22/06/2026

Reviewed By

Mohamed Imran Lakhi

MPharm - Lead Pharmacist

Imran Lakhi is the superintendent pharmacist and founder at Prescription Doctor. He has been at the core of our team.

Reviewed on: 22/06/2026