The Wegovy Tablet shares the same active medicine as the Wegovy injection (semaglutide), so its side effects are broadly the same: mostly digestive symptoms such as nausea, diarrhoea, constipation, vomiting, reduced appetite and tiredness, which tend to be mildest at low doses and often ease over time.
Because it is a once-daily tablet rather than a weekly injection, there are a few practical differences worth understanding — particularly around how and when you take it. Here is what to expect in a UK context.
What is the Wegovy Tablet?
The Wegovy Tablet, is oral semaglutide taken once a day. It is the same active ingredient as the once-weekly Wegovy injection, delivered in tablet form.
Semaglutide is a GLP-1 receptor agonist. It mimics a natural gut hormone that helps control appetite, so you feel fuller sooner and for longer, and the stomach empties more slowly. This is also why the most common side effects are digestive.
The Wegovy Tablet is live and in stock in the UK, having launched in July 2026. It is a Prescription-Only Medicine, available only after a clinical consultation with a GPhC-registered prescriber.
Common Wegovy Tablet side effects
These affect more than 1 in 10 people and reflect the wider GLP-1 class. They are usually most noticeable in the first weeks and after each dose increase, then tend to settle:
- Nausea — the most common effect, often mild and improving with time.
- Diarrhoea
- Constipation
- Vomiting
- Decreased appetite — expected, and part of how the medicine works.
- Fatigue
These happen largely because the medicine slows how quickly your stomach empties and changes appetite signals. Eating smaller, less fatty meals and staying hydrated can help you manage them.
Serious but rare side effects
These are uncommon, but you should be aware of them and seek medical help promptly if they occur:
- Severe allergic reaction
- Acute pancreatitis (severe, persistent tummy pain, often spreading to the back)
- Severe hypoglycaemia (low blood sugar), particularly if combined with certain diabetes medicines
- Severe gastrointestinal disease
- Worsening diabetic retinopathy
If you have questions about whether a symptom is normal, you can contact The Weight Clinic or speak to your prescriber.
Tablet vs injection: do the side effects differ?
Because the tablet and injection use the same active medicine, the type of side effects is the same. The main practical difference is timing and the way the medicine is taken, which can shape how symptoms feel day to day.
| Feature | Wegovy Tablet | Wegovy injection |
|---|---|---|
| How taken | Once-daily tablet | Once-weekly self-injection |
| Active medicine | Semaglutide | Semaglutide |
| Side effect type | GLP-1 class (mainly digestive) | GLP-1 class (mainly digestive) |
| Timing note | Empty stomach, wait 30 minutes before eating/drinking | Any time of day, with or without food |
With a daily tablet, any nausea tends to relate to your daily dose rather than a single weekly peak. Some people find a steady daily routine easier to manage; others prefer a weekly injection. There is no universally "better" option — a prescriber will help you decide what suits you.
The empty-stomach rule matters for tolerability
How you take the Wegovy Tablet directly affects both how well it works and how it feels. Take it first thing on an empty stomach with only a small sip of plain water, then wait at least 30 minutes before eating, drinking anything else, or taking other medicines.
Taken with food, it is far less effective and absorbed unpredictably. Following the empty-stomach rule consistently helps keep the dose steady, which supports steadier tolerability.
How the dose builds up
Side effects are more likely when you first start and at each step up in dose, so Wegovy is introduced gradually. The tablet titration is:
- 1.5mg (starter)
- 4mg
- 9mg
- 25mg (maintenance, maximum licensed dose)
This slow build-up gives your body time to adjust and is designed to reduce the intensity of digestive symptoms. Never rush ahead of the schedule your prescriber sets.
On efficacy: in the OASIS 4 trial, adults on oral semaglutide 25mg lost on average 16.6% of their body weight over 64 weeks, alongside lifestyle support. Individual results vary; not everyone reaches this. This is a cross-trial figure and not a head-to-head comparison with the injection.
Who should not take the Wegovy Tablet
Eligibility is consistent across our injectable and tablet treatments. You may be considered if you are aged 18+ and have a BMI of 30 or above, or a BMI of 27–30 with a weight-related condition such as type 2 diabetes, high blood pressure or sleep apnoea.
It is not suitable if you are pregnant, planning pregnancy or breastfeeding; have type 1 diabetes; have a personal or family history of medullary thyroid carcinoma or MEN2; have a history of pancreatitis; have severe gastrointestinal disease; have an active eating disorder; have severe liver or kidney impairment; or have a known allergy to the active ingredient.
A treatment is prescribed only if clinically appropriate after a free online consultation.
Practical tips for managing side effects
- Eat smaller portions and stop when comfortably full.
- Limit fatty, fried and very sugary foods, which can worsen nausea.
- Stay well hydrated, especially if you have diarrhoea or vomiting.
- Increase fibre and fluids if you become constipated.
- Give each dose step time — symptoms often ease as your body adjusts.
Reporting side effects
If you experience side effects, you can report them through the MHRA Yellow Card scheme at https://yellowcard.mhra.gov.uk/. Reporting helps improve the safety monitoring of all medicines in the UK.
Exploring your options
If you are comparing treatments, you can read about the Wegovy injection, Mounjaro, and our full range on the treatments overview. A once-daily pill taken any time of day, Foundayo (orforglipron), is expected in the UK once MHRA-licensed and is not yet available to buy.
When you are ready, the best next step is a free eligibility check, where a GPhC-registered prescriber can review your health and advise whether a treatment is appropriate for you.
This article is for information only and is not a substitute for personalised medical advice. Weight-loss medicines are prescription-only, are not suitable for everyone, and are prescribed only after a clinical consultation with a GPhC-registered prescriber. Individual results vary. Always speak to a UK-registered pharmacist or doctor before starting or changing any prescription medication.
