Wegovy 1mg weight loss injection is a prescription medicine for adults with obesity or weight-related health problems. Used once a week alongside a healthy diet and increased physical activity, it helps you lose weight and maintain it [1].
Product description: Wegovy 1mg weight loss injection
Wegovy 1mg weight loss injection is a prescription-only medicine designed to support weight loss in adults with obesity. It can also be used in those who are overweight and have related health problems. The 1mg dose is a crucial step in the Wegovy dose-escalation plan, helping your body adjust gradually to the medication and minimising the risk of side effects [1].
Wegovy is given once a week using a simple, pre-filled FlexTouch pen.
The active ingredient, semaglutide, acts like a hormone your body naturally produces to control hunger and appetite. By helping you feel full for longer, the semaglutide weight loss injection makes it easier to stick to a healthy eating plan and avoid overeating [3].
Key benefits of the Wegovy 1mg injection:
Once-weekly, self-administered injection
Gradual dose escalation for better tolerance
Proven, sustainable weight loss results
Effective for people with obesity and weight-related health conditions
Wondering if Wegovy 1mg weight loss injection is right for you? This guide covers everything: how it works, who it’s for, dosage details, side effects, and expert tips for success—so you can make a confident, informed choice on your weight loss journey.
Five key takeaways
Wegovy 1mg weight loss injection is a once-weekly prescription medicine clinically proven to help adults lose significant weight and keep it off when combined with healthy lifestyle changes [1]</a>.
The active ingredient, semaglutide, mimics your natural appetite hormone, helping you feel fuller for longer and reducing cravings [3].
The 1mg dose is a key step in the gradual dose-escalation plan, helping your body adjust and minimising side effects [1].
Wegovy works best when paired with a calorie-controlled diet and increased physical activity [2].
Clinical trials show Wegovy can lead to long-lasting, meaningful weight loss and improvements in obesity-related health conditions [2].
Overview: Wegovy 1mg weight loss injection
Wegovy 1mg weight loss injection is part of a new generation of weight management medicines that have revolutionised obesity care in the UK. Unlike older treatments, Wegovy uses a hormone-based approach to help you feel satisfied and full, so you’re less likely to overeat.
The 1mg dose is an important step in your treatment journey, allowing your body to adjust and minimising the chance of unwanted side effects. Most people stay on this dose for at least four weeks before moving up to the next strength, but your clinician will personalise your plan [1].
Clinical studies have shown that patients using Wegovy 1mg weight loss injection, combined with healthy lifestyle changes, can achieve significant and sustained weight loss. Many also see improvements in related health issues, such as blood pressure and cholesterol [2].
Active ingredient: Wegovy 1mg weight loss injection
The active ingredient in Wegovy 1mg weight loss injection is semaglutide, a GLP-1 receptor agonist that acts like your body’s own appetite-control hormone [3].
What is Wegovy 1mg weight loss injection for?
Wegovy 1mg weight loss injection is used to help adults lose weight and maintain weight loss. It’s prescribed for people with a BMI of 30 or higher, or those with a BMI of 27 or higher who have weight-related health conditions such as high blood pressure or type 2 diabetes [2].
The aim is to support long-term, sustainable weight loss—not just quick results. Wegovy is most effective when used in conjunction with a calorie-controlled diet and increased physical activity [2].
How does Wegovy 1mg weight loss injection work?
Wegovy 1mg weight loss injection contains semaglutide, which acts like the hormone GLP-1 in your body. GLP-1 is released after you eat and tells your brain that you’re full. Semaglutide helps you feel satisfied with less food, making it easier to stick to a healthy eating plan [1].
This medicine not only reduces hunger but also slows how quickly food leaves your stomach, so you feel fuller for longer and are less likely to snack between meals [3].
Wegovy 1mg weight loss injection may also help reduce cravings for high-calorie foods, supporting healthier choices and ongoing weight control [2].
How to use Wegovy 1mg weight loss injection
Wegovy 1mg weight loss injection comes in a pre-filled FlexTouch pen, making self-injection simple. Inject yourself once a week, on the same day each week, into the fatty tissue just under the skin of your abdomen, thigh, or upper arm [1].
Rotate your injection sites each time to avoid irritation—try alternating between your abdomen, thigh, and upper arm.
If you miss a dose, take it as soon as you remember (if it’s within five days of your scheduled dose). If more than five days have passed, skip the missed dose and take your next injection on your usual day. Never double up on doses [1].
Warnings and precautions: Wegovy 1mg weight loss injection
Before starting Wegovy 1mg weight loss injection, let your healthcare provider know if you have a history of thyroid cancer, pancreatitis, or gallbladder problems. Wegovy isn’t suitable for people with certain rare genetic conditions, such as Multiple Endocrine Neoplasia syndrome type 2 [1].
Wegovy should not be used during pregnancy or breastfeeding. If you’re planning to get pregnant, stop using Wegovy at least two months before trying to conceive [1].
Tell your healthcare provider about all other medicines you’re taking, as Wegovy can interact with some diabetes medications and other drugs that affect blood sugar.
Side effects: Wegovy 1mg weight loss injection
Like all medicines, Wegovy 1mg weight loss injection can cause side effects. The most common are mild and temporary, such as nausea, vomiting, diarrhoea, constipation, and headache [1].
Most side effects improve as your body gets used to the medicine. Starting at a low dose and increasing gradually helps reduce the risk of side effects.
Rare but serious side effects include pancreatitis, gallbladder problems, kidney issues, and allergic reactions. If you notice severe abdominal pain, yellowing of the skin or eyes, or signs of an allergic reaction, seek medical advice immediately [1].
Drug interactions: Wegovy 1mg weight loss injection
Wegovy 1mg weight loss injection can interact with other medications, especially those used to treat diabetes, such as insulin or sulfonylureas. These combinations can increase the risk of low blood sugar (hypoglycaemia), so your doctor may need to adjust your doses [3].
Some oral medications may be absorbed more slowly when used with Wegovy, due to its effect on stomach emptying. Tell your healthcare provider about all the medicines you take, including over-the-counter and herbal products [1].
Always check with your healthcare team before starting any new medicine while using Wegovy 1mg weight loss injection.
Frequently asked questions: Wegovy 1mg weight loss injection
What is Wegovy 1mg weight loss injection used for?
Wegovy 1mg weight loss injection is used to help adults lose weight and maintain weight loss, especially for those with obesity or weight-related health problems.
How does Wegovy 1mg weight loss injection work?
It mimics the GLP-1 hormone, helping you feel fuller for longer, reducing appetite, and supporting healthy weight loss.
How do I use the Wegovy 1mg weight loss injection pen?
Inject once a week, on the same day, into the fatty tissue of your abdomen, thigh, or upper arm. Rotate sites to avoid irritation.
What should I do if I miss a dose?
Please take it as soon as you remember (within five days). If you miss by more than five days, skip the missed dose and continue as normal.
How long does it take to see results with Wegovy 1mg weight loss injection?
Most people begin to see weight loss within a few weeks, but the full effects are typically observed over several months of consistent use.
Can I use Wegovy 1mg weight loss injection in combination with other weight loss medications?
Discuss with your prescriber first, as combining medicines may increase side effects or risks.
Are there foods or drinks I should avoid?
There are no specific foods to avoid; however, a healthy, calorie-controlled diet will help you achieve the best results.
Is Wegovy 1mg, a weight loss injection, safe for everyone?
It’s not suitable for people with certain medical conditions or allergies. Always check with your healthcare provider.
Can I use Wegovy 1mg weight loss injection if I’m pregnant or breastfeeding?
No. Wegovy should not be used during pregnancy or breastfeeding. Stop treatment at least two months before planning a pregnancy.
References
[1] Electronic Medicines Compendium (emc). (2025) Wegovy 1 mg solution for injection in pre-filled pen: Patient Information Leaflet. Available at: https://www.medicines.org.uk/emc/product/13800/pil#gref (Accessed: 30 August 2025).
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