Semaglutide injections for weight loss
Wegovy
נבדק על ידי Sid Dajaniעודכן לאחרונה על ידי Michael Stewart, MRPharmSLast updated 1 Oct 2024
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Semaglutide injections should be given once each week on the same day each week. Store unopened packs of semaglutide in a fridge. Once in use, you can keep the pre-filled pen at room temperature.
If at any time you develop severe stomach pain with sickness (nausea and vomiting), speak with a doctor as soon as possible.
The most common side-effects are mild digestive problems such as feeling sick (nausea), being sick (vomiting), diarrhoea or constipation - these usually reduce over time.
At a glance
Semaglutide (Wegovy®) is a medicine that helps with weight loss in adults and children over 12.
It is used with a calorie-controlled diet and exercise plan.
Semaglutide works by helping you feel fuller and less hungry, reducing cravings.
It is given as an injection once a week.
You will be shown how to inject yourself into your upper arm, thigh, or tummy.
Common side effects include feeling sick, diarrhoea, constipation, and headache.
Seek medical advice if you experience severe tummy pain.
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About semaglutide
סוג התרופה | A GLP-1 analogue |
שימוש עבור | To help with weight loss in adults and children over 12 years, in addition to a calorie-controlled diet and exercise plan |
נקרא גם | Wegovy® |
זמין כ | Injections in pre-filled pens |
Semaglutide very closely resembles a natural hormone called glucagon-like peptide-1 (GLP-1) that is released in your intestines after eating a meal. This hormone tells your brain that you have eaten something. Semaglutide works by stimulating the receptors in your brain that control appetite. This makes you feel fuller or less hungry with fewer cravings for food, helping you to eat less and lose weight.
Semaglutide should only be used as an addition to a calorie-controlled diet and increased physical activity. Ask your doctor for advice on maintaining a healthy lifestyle.
Semaglutide also has other effects on your body. It increases the amount of insulin produced by your body, which then reduces the level of sugar in your blood. It also works on your stomach so that food passes more slowly through it, making you feel fuller for longer.
Semaglutide is also used to treat type 2 diabetes. If you are using semaglutide for this reason, see our separate medicine leaflet called Semaglutide for diabetes.
Before starting semaglutide treatment
חזרה לתוכןSome medicines are not suitable for people with certain conditions, and sometimes a medicine may only be used if extra care is taken. For these reasons, before you start treatment with semaglutide it is important that your doctor knows:
אם את בהריון, מנסה להיכנס להריון, או מניקה.
If you have a problem with your stomach or digestive system.
If you have any problems with the way your liver works or the way your kidneys work.
If you have an underactive or overactive thyroid gland.
If you have ever had an inflamed pancreas (pancreatitis).
אם אי פעם הייתה לך תגובה אלרגית לתרופה.
אם אתה נוטל תרופות אחרות כלשהן. זה כולל כל תרופה שאתה נוטל שניתן לרכוש ללא מרשם, כמו גם תרופות צמחיות ומשלימות.
המשך לקרוא למטה
How to use semaglutide injections (Wegovy®)
חזרה לתוכןBefore you start the treatment, read the manufacturer's printed information leaflet from inside the pack as well as any information you are given by your doctor or diabetes clinic. The manufacturer's leaflet will provide you with a full list of the side-effects which you may experience.
Use Wegovy® exactly as your doctor tells you to. Your doctor or a nurse will show you how to inject yourself. Wegovy® should be injected into the skin on your upper arms, thigh, or tummy (abdomen). Try to choose a different injection site for each of your injections. This will help to prevent skin problems and difficulties in injecting.
After each injection, remove the needle to help prevent problems with blockage, leakage or infection.
Wegovy® should be injected once each week, on the same day each week. Each pre-filled pen provides a single dose. The injection can be given at any time of the day, and it can be given either before or after a meal. It is best to have your doses around the same time each day.
There are several different strengths of semaglutide injection. You will start with a 0.25 mg dose once a week for four weeks, followed by 0.5 mg once a week for at least another four weeks. Provided you are not experiencing side-effects your dose will be increased every four weeks until you reach a maintenance dose of 2.4 mg.
If you forget to use the injection on your usual day, use it as soon as you remember and keep to your normal weekly schedule. However, if it has been more than five days since the missed dose, skip the forgotten dose and take your next dose when it is due.
You can change the day of your scheduled dose as long as you leave at least three days (72 hours) between doses. For example, if your dose is usually scheduled for Monday morning you could change it to Thursday morning at the earliest. Then continue each week on Thursdays.
להפיק את המרב מהטיפול שלך
חזרה לתוכןIt is important that you keep your regular doctor's and clinic appointments. This is so that your progress can be monitored.
It is important for you to drink plenty of fluids while you are using semaglutide. Adults should aim to drink at least two litres (about 8-10 cups) of fluid per day. Most sorts of drink will do but as a start, try just drinking a glass of water 3-4 times a day in addition to what you normally drink.
Try to eat a balanced diet containing high-fibre foods such as wholemeal and wholegrain breads and cereals, fruit and vegetables, brown rice and wholemeal pasta. If you are not used to a high-fibre diet, it may be best to increase the amount of fibre you eat gradually.
The NHS recommends 150 minutes of physical activity per week - that's 30 minutes, five days a week. Ask your doctor or a pharmacist for advice about increasing your physical activity. It is best to start slowly and build up your level of activity over a period of a few weeks.
If you are having an operation or any dental treatment that requires a general anaesthetic, tell the person carrying out the treatment that you are using these injections. This medicine slows down stomach emptying which may affect the timing of your operation.
This medicine should not be used during pregnancy. Women and girls of childbearing potential must use effective contraception during treatment and for two months after stopping.
המשך לקרוא למטה
Can semaglutide cause problems?
חזרה לתוכןAlong with their useful effects, most medicines can cause unwanted side-effects although not everyone experiences them. The table below contains some of the most common ones associated with semaglutide. You will find a full list in the manufacturer's information leaflet supplied with your medicine. The unwanted effects often improve as your body adjusts to the new medicine, but speak with your doctor or pharmacist if any of the following continue or become troublesome.
Very common semaglutide side-effects (these affect more than 1 in 10 people) | מה אני יכול לעשות אם אני חווה את זה? |
תחושת חולי (בחילה), כאב בטן (כאבי בטן) | היצמד למאכלים פשוטים - הימנע ממאכלים עשירים או חריפים |
שלשול | שתו הרבה מים כדי להחליף נוזלים שאבדו |
עצירות | Drink plenty of water and eat a balanced diet including lots of fruit and vegetables |
Being sick (vomiting) | Stick to simple foods - avoid rich or spicy meals. Drink plenty of water to replace lost fluids |
כאב ראש | שתו הרבה מים ובקשו מהרוקח להמליץ על משכך כאבים מתאים. אם הכאבי ראש נמשכים, ידעו את הרופא שלכם |
Tiredness, fatigue | This should pass once you get used to the medicine |
Common semaglutide side-effects (these affect fewer than 1 in 10 people) | מה אני יכול לעשות אם אני חווה את זה? |
Indigestion, bloating, wind, gallstones | היצמד למאכלים פשוטים - הימנע ממאכלים עשירים או חריפים |
Increased heart rate, hair loss, changes to the way you taste or feel things | Let your doctor know if these become troublesome |
תחושת סחרחורת | Do not drive and do not use tools or machines until you feel better |
Redness or swelling at the injection site | Use a different injection site each week |
חשוב: This medicine can cause persistent and severe tummy (abdominal) pain with sickness (nausea and/or vomiting) in a few people. If this happens to you, you should speak with your doctor as soon as possible as these can be symptoms of an inflamed pancreas (pancreatitis).
Semaglutide injections can cause low blood sugar (hypoglycaemia). Signs include feeling shaky or anxious, sweating, looking pale, feeling hungry, a feeling that your heart is pounding (palpitations), and feeling dizzy. If this happens to you, eat or drink something sugary and then follow this up with a snack such as a sandwich or a piece of fruit.
אם אתה חווה תסמינים נוספים שלדעתך עשויים להיות כתוצאה מתרופה זו, פנה לרופא או לרוקח שלך.
How to store semaglutide injections
חזרה לתוכןשמור את כל התרופות מחוץ להישג ידם וראייתם של ילדים.
Store unopened packs of pre-filled pens in a fridge. Do not freeze the pens and do not use them if you think they have been accidentally frozen.
Once in use you can keep the pre-filled pen at room temperature for up to six weeks. Keep the cap on the pen to protect the medicine from light.
מידע חשוב על כל התרופות
חזרה לתוכןמידע חשוב על כל התרופות
לעולם אל תיקח יותר מהמינון שנקבע. אם אתה חושד שאתה או מישהו אחר אולי לקח מנת יתר של תרופה זו, פנה למחלקת תאונות וחירום בבית החולים המקומי שלך. קח את המיכל איתך, אפילו אם הוא ריק.
תרופה זו מיועדת עבורך. לעולם אל תיתן אותה לאנשים אחרים, גם אם מצבם נראה דומה לשלך.
אל תשמרו תרופות שפג תוקפן או שאינן רצויות. קחו אותן לבית המרקחת המקומי שלכם שיטפל בהן עבורכם.
אם יש לך שאלות לגבי התרופה הזו, שאל את הרוקח שלך.
MHRA - דיווח על תגובות שליליות
דווח על תופעות לוואי חשודות לתרופות, חיסונים, סיגריות אלקטרוניות, תקריות עם מכשירים רפואיים, מוצרים פגומים או מזויפים לסוכנות הרגולטורית לתרופות ומוצרי בריאות כדי להבטיח שימוש בטוח ויעיל.

לא בטוחים לגבי ערבוב תרופות?
בדוק אינטראקציות אפשריות בין תרופות, תוספים ומזונות לפני נטילתם יחד.
שאלות נפוצות
How does semaglutide help me lose weight?
Semaglutide works by mimicking a natural hormone in your body called GLP-1, which is released after you eat. It tells your brain you've eaten, helping you feel fuller, less hungry, and reducing food cravings. This can lead to eating less and losing weight. Additionally, it slows down how quickly food leaves your stomach, making you feel full for longer.
Can I use semaglutide if I already have type 2 diabetes?
Semaglutide is also used to treat type 2 diabetes. However, if you are specifically using it for diabetes, there is a separate medicine leaflet available called 'Semaglutide for diabetes' that provides information tailored to that use.
How often do I need to inject semaglutide and at what time of day?
You should inject semaglutide once each week, and it's best to do it on the same day every week. You can choose to inject it at any time of day, either before or after a meal, but try to keep the time consistent each week.
What if I miss a semaglutide dose or want to change my injection day?
If you forget your weekly injection, take it as soon as you remember and then continue with your normal weekly schedule. However, if more than five days have passed since the missed dose, you should skip that dose and take your next one when it's due. You can change your scheduled injection day, but make sure there are at least three days (72 hours) between the last dose and the new scheduled dose.
What should I do if I experience low blood sugar while using semaglutide?
Signs of low blood sugar (hypoglycaemia) include feeling shaky or anxious, sweating, looking pale, hunger, a pounding heart, and dizziness. If you experience these symptoms, you should immediately eat or drink something sugary, and then follow it up with a more substantial snack like a sandwich or a piece of fruit.
I'm having surgery soon; do I need to inform anyone about my semaglutide use?
Yes, if you are having an operation or dental treatment that requires a general anaesthetic, it's important to tell the person carrying out the treatment that you are using semaglutide injections. This medicine slows down the emptying of your stomach, which could affect the timing of your procedure.
How should I store my semaglutide pens?
Unopened semaglutide pens should be stored in a fridge and must not be frozen. Once you start using a pen, you can keep it at room temperature for up to six weeks. Always keep the cap on the pen to protect the medicine from light.
קריאה נוספת והפניות
- Manufacturer's PIL, Wegovy® FlexTouch 0.25 mg, 0.5 mg, 1 mg, 1.7 mg and 2.4 mg solution for injection in pre-filled pen; Novo Nordisk Limited, The electronic Medicines Compendium. Dated June 2024
- תרופות מלאות BNF מהדורה 89; האגודה הרפואית הבריטית והחברה המלכותית לפרמקולוגיה של בריטניה הגדולה, לונדון.
המשך לקרוא למטה
About the authorView full bio

מייקל סטיוארט, MRPharmS
Medicine Leaflet Review Manager – Contractor, Pharmacist
BPharm (Hons), MRPharmS
Michael is a community pharmacist practicing in the Midlands and South Yorkshire with more than 20 years’ experience advising on medicines and medical conditions. He has a strong background in healthcare training, having produced and delivered training courses for pharmacy teams and staff of residential care settings, including nurses. He has also contributed to pharmacy advisory boards for the management of low acuity conditions in the community.
About the reviewer

סיד דג'אני
Sultan Dajani qualified at the London School of Pharmacy in 1994 and became the youngest elected member of the Royal Pharmaceutical Society council since its founding in 1842.
היסטוריית המאמר
המידע בעמוד זה נכתב ונבדק על ידי קלינאים מוסמכים.
הסקירה הבאה מתוכננת ל: 1 אוקטובר 2027
1 Oct 2024 | הגרסה האחרונה
3 ספטמבר 2024 | פורסם במקור
נכתב על ידי:
מייקל סטיוארט, MRPharmS

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