Wegovy Tablets vs Mounjaro 

The main difference between the Wegovy pill and Mounjaro lies in how many metabolic hormones they target, and how strongly they influence appetite, digestion, and energy balance.

Wegovy tablets

The Wegovy pill (oral semaglutide) works through a single hormone pathway involved in appetite and blood sugar regulation:

GLP-1: tells your brain you’re full sooner and for longer, while also keeping blood sugar levels stable.

Further reading: How do Wegovy tablets work?

Mounjaro

Mounjaro (tirzepatide) goes one step further by activating two hormones:

GLP-1: slows stomach emptying, reduces appetite, and helps you feel fuller for longer.

GIP: enhances insulin release and may further improve how the body stores and uses energy.

This dual action means tirzepatide enhances feelings of fullness even more strongly, delivers further slows gastric emptying and has a greater effect on insulin sensitivity and blood sugar control.

The addition of GIP activity is thought to amplify weight loss effects by improving how the body uses and stores energy, not just how hungry you feel.

Wegovy tablets

In one of the largest trials of a GLP-1 tablet for weight loss, 667 participants adults with obesity or overweight (without diabetes) were observed. They took high-dose oral semaglutide and achieved an average weight loss of around 17% of body weight over 68 weeks, compared with placebo.

Further reading: Wegovy tablets results 

Mounjaro

Tirzepatide injection (Mounjaro) has already been extensively studied. In the main trial (SURMOUNT-1) of 2,539 participants, adults with obesity or being overweight achieved up to 22.5% average weight loss over 72 weeks on the highest dose of tirzepatide, with lower doses also delivering substantial results.

Further reading: Mounjaro results

Wegovy tablets

Wegovy tablets are taken once daily. They need to be taken correctly, usually on an empty stomach with a small amount of water, followed by a waiting period before eating or drinking.

Further reading: Wegovy tablets dosage

Mounjaro

Mounjaro is taken once weekly as an injection. It usually starts at 2.5mg once weekly, then increases gradually depending on response and side effects.

Further reading: Mounjaro dosage

Wegovy tablets

Both have broadly similar side effect profiles, but they differ in how much real-world and long-term data is currently available.

Wegovy pill safety profile is consistent with GLP-1 medications. In the OASIS 1 trial, around 6–7% of participants discontinued treatment due to adverse events, with serious adverse events reported but remaining uncommon overall. Gastrointestinal side effects such as nausea, vomiting and diarrhoea were the most common.

Mounjaro

Tirzepatide injection (mounjaro) safety profile has already been extensively studied.

In the main trial approximately 4–7% of participants discontinued treatment due to adverse events, depending on the dose, with higher doses linked to increased discontinuation.

Serious adverse events were low and broadly comparable to placebo, supporting its tolerability in large-scale studies. Gastrointestinal side effects were also the most commonly reported.

Further reading: Is Mounjaro safe?

Wegovy tablets

Common side effects include:

• nausea
• vomiting
• diarrhoea
• constipation
• abdominal discomfort
• reduced appetite
• bloating

Further reading: Wegovy tablets side effects

Mounjaro

Common side effects include:

• nausea
• diarrhoea
• vomiting
• constipation
• reduced appetite
• indigestion or reflux
• injection site reactions

Further reading: Mounjaro side effects

Wegovy tablets

Wegovy tablets are needle-free, which may suit people who dislike injections. However, they must be taken every day and timing matters.

Further reading: How to take Wegovy tablets

Mounjaro

Mounjaro is an injection, but only once a week. Many people find this easier than remembering a daily tablet.

Wegovy tablets

Wegovy tablets reduce hunger and help people feel fuller by activating the GLP-1 pathway.

Mounjaro

Mounjaro acts on both GLP-1 and GIP pathways, which may produce stronger appetite suppression. This is reflected in its higher average weight loss results of up to 22.5% in SURMOUNT-1.

Wegovy tablets

Wegovy tablets have not yet been released in the UK, so there is no confirmed UK private price.

Further reading: Where to buy Wegovy tablets

Mounjaro

Mounjaro is already available privately in the UK, so current prices can be compared between regulated providers.

Pound for pound, Mounjaro appears to be the stronger option for weight loss, particularly when comparing average results seen in clinical trials.

However, Wegovy tablets still offer meaningful weight loss and are likely to appeal strongly to people who dislike needles, feel uncomfortable self-injecting, or would simply prefer the convenience of a daily tablet.

In the long run, both treatments can help patients achieve significant weight loss when used consistently alongside lifestyle changes.

The “better” option is not always the one with the highest headline result; it often comes down to personal preference, tolerability, routine, and what someone is most likely to stick with.

It is also worth noting that Wegovy tablets have not yet launched in the UK, so pricing, availability and prescribing criteria may all influence how attractive they are compared with injectable treatments once they become available.