Overweight treatment
What is overweight?
Overweight and obesity are common health concerns in the UK and are associated with an increased risk of conditions such as type 2 diabetes, cardiovascular disease, certain cancers and joint problems. For many adults, gradual and sustainable weight loss can be achieved through lifestyle changes, including nutrition, physical activity, sleep and behavioural support.
In some cases, medical treatment may be considered as part of a structured, clinician-led approach, particularly when excess weight is affecting health or increasing future health risks.
Important information DoktorABC UK is a digital health platform that connects patients with independent, UK-registered healthcare professionals. DoktorABC UK does not itself provide medical care, issue prescriptions or dispense medicines. All clinical decisions are made by the prescribing clinician following an individual medical assessment.
Service information (price placeholders) Consultation fee: [[PLACEHOLDER £45]] Medication prices from: [[PLACEHOLDER £70]] All prices are placeholders and must be confirmed before publication.
Available treatment approaches
- GLP-1 injectable therapy
- Fat-blocker tablet therapy
- Foundations of weight management
How the assessment process works
- Complete a secure medical questionnaire
- Select a treatment category for assessment
- An independent prescriber reviews your information and determines whether medical treatment may be appropriate
- Next steps are arranged following clinical approval
Medical questions and answers
How do I know if I may be suitable for medical weight management?
Suitability is assessed by a clinician based on your health profile, medical history and individual goals.
Medical treatment may be considered if you:
- have a body mass index (BMI) of 30 or higher (obesity), or
- have a BMI of 27 or higher (overweight) and at least one weight-related condition, such as high blood pressure, type 2 diabetes, high cholesterol or sleep apnoea.
How does DoktorABC UK support weight management?
DoktorABC UK provides access to independent healthcare professionals who can assess overweight and obesity via a secure online process. A clinician reviews your medical questionnaire and determines whether medical treatment is appropriate for you.
If approved, a prescription may be issued by the prescriber in line with UK regulations. Follow-up consultations and repeat assessments, where clinically appropriate, can be managed through your account.
Which medicines may be considered?
Where appropriate, prescribers may consider fully authorised medicines used in weight management.
These may include:
GLP-1 receptor agonists (for example, medicines containing semaglutide, liraglutide or tirzepatide), depending on clinical suitability and UK availability
Fat-blocker tablets containing orlistat
Whether a medicine is suitable depends on individual health factors and must be determined by a clinician.
What is GLP-1 treatment and how does it work?
GLP-1 medicines mimic a naturally occurring gut hormone (glucagon-like peptide-1) involved in appetite regulation.
They may support weight loss through two main mechanisms: • Digestion: slowing gastric emptying, which can help you feel full sooner and for longer • Brain: acting on appetite and satiety centres to reduce hunger and cravings.
What dose is used with GLP-1 medicines?
Treatment usually starts at a low dose and is increased gradually. This process, known as titration, allows the body to adjust and can reduce side effects.
If you are already using a GLP-1 medicine, you should declare your current dose during the medical assessment. The prescriber will decide whether continuation at the same dose is appropriate.
The final dose and schedule are always determined by the prescribing clinician.
How are these medicines taken?
This depends on the treatment prescribed:
- Injection pens GLP-1 medicines are administered as subcutaneous injections. Common injection sites include the abdomen, thigh or upper arm.
- Tablets Fat-blocker tablets are taken by mouth with water. Timing is important, and they are usually taken with meals containing fat.
Always follow the instructions provided by your prescriber and the patient information leaflet.
How often are GLP-1 injections used?
Injection frequency depends on the specific medicine prescribed:
- Once weekly: many newer GLP-1 medicines are injected once per week
- Once daily: some medicines require daily injection
Maintaining a consistent dosing schedule can help support treatment adherence.
How quickly might results be noticed?
Individual responses vary. Many people first notice a reduction in appetite and cravings within the first few weeks. Weight changes, where they occur, typically become apparent over subsequent weeks and months.
In large clinical studies, adults with overweight or obesity treated with semaglutide alongside lifestyle interventions experienced an average weight loss of approximately 15% over 68 weeks, compared with placebo. Individual outcomes vary and cannot be guaranteed.
How long is treatment usually continued?
Obesity is recognised as a chronic condition. Medical treatment is therefore often considered a longer-term support rather than a short-term solution.
Treatment commonly involves: • an initial dose-adjustment phase • a weight-loss phase • a longer-term maintenance phase to support weight stability
Stopping treatment may lead to increased appetite and weight regain in some individuals. Any changes should be discussed with a clinician.
How effective are GLP-1 medicines?
Effectiveness varies depending on the medicine used, dose, adherence and lifestyle factors. Clinical trials have demonstrated clinically meaningful weight loss when GLP-1 medicines are combined with dietary and activity changes. Results vary between individuals.
How can the effects of treatment be supported?
Medicines work best alongside lifestyle measures. Clinicians often recommend focusing on:
- Protein and hydration. Adequate protein intake helps preserve muscle mass during weight loss. Sufficient fluid intake supports general health and may reduce gastrointestinal side effects.
- Strength-based activity. Strength or resistance exercise two to three times per week supports muscle mass and metabolic health.
- Behavioural strategies. Eating slowly, stopping when comfortably full and avoiding overeating can reduce discomfort and support long-term habits.
What is fat-blocker tablet therapy and how does it work?
Fat-blockers such as orlistat act in the digestive system by inhibiting enzymes that break down dietary fat. As a result, some fat from food is not absorbed and is passed through the body.
What dose is used with fat-blocker tablets?
A typical regimen is one capsule with each main meal that contains fat. If a meal is skipped or contains no fat, the dose is usually omitted.
Always follow your prescriber's advice.
How effective are fat-blocker tablets?
Clinical studies show modest average weight loss, particularly when treatment is combined with a reduced-fat, calorie-controlled diet. Individual results vary.
Are these treatments safe?
All prescription medicines carry potential risks and side effects and may not be suitable for everyone.
Risk is reduced through:
- a medical assessment before prescribing
- gradual dose increases where appropriate
- ongoing review if side effects occur
Read the patient information leaflet and seek medical advice if you experience severe or persistent symptoms.
What side effects can occur with GLP-1 medicines?
The most common side effects affect the digestive system and often improve over time:
- nausea
- diarrhoea or constipation
- vomiting
- abdominal discomfort or bloating
Serious side effects are uncommon. Seek urgent medical advice for severe abdominal pain, breathing difficulties or signs of an allergic reaction.
What side effects can occur with fat-blocker tablets?
Most side effects are diet-related and more likely with high-fat meals:
- oily stools
- urgent bowel movements
- flatulence with discharge
- abdominal discomfort
- headache
Reducing dietary fat intake usually improves tolerability.
How can treatment be stopped safely?
Do not stop prescription treatment without medical advice. If you wish to discontinue, a clinician can advise on a safe plan and strategies to support weight maintenance.
Overweight: understanding the condition and treatment options
Overweight refers to body weight that is higher than what is generally considered healthy for a person's height. Excess weight is associated with an increased risk of several long-term health conditions, including type 2 diabetes, cardiovascular disease, stroke, certain cancers and joint problems.
Overweight can be influenced by multiple factors, including dietary habits, physical inactivity, genetics, sleep patterns, stress, certain medicines and underlying medical conditions.
How overweight is defined
A commonly used measure is the body mass index (BMI), which relates body weight to height.
| BMI category |
BMI value |
| Overweight |
BMI ≥ 25 |
| Obesity |
BMI ≥ 30 |
Note:
BMI is a screening tool and does not distinguish between fat mass and muscle mass. A healthcare professional can help interpret BMI results in the context of overall health.
BMI is calculated as body weight in kilograms divided by height in metres squared.
Example: A person who weighs 60 kg and is 1.70 m tall has a BMI of 20.76, which falls within the generally accepted healthy range.
Good to know. BMI does not distinguish between fat mass and muscle mass. People with higher muscle mass may have a higher BMI without excess body fat.
When should overweight be addressed?
Weight management may be recommended when excess weight contributes to health problems or increases the risk of future complications, such as high blood pressure or type 2 diabetes.
In some cases, support may also be appropriate when excess weight affects mobility, mental wellbeing or quality of life. Decisions about treatment should always take individual factors into account, including age, overall health and lifestyle, and should be discussed with a qualified healthcare professional.
Important. Some medicines, including certain corticosteroids and antidepressants, can contribute to weight gain. Any concerns about medication should be discussed with a clinician rather than stopping treatment independently.
Which healthcare professionals can support weight management?
Depending on individual needs, different healthcare professionals may be involved:
General practitioners or primary care clinicians
Often the first point of contact for assessment and advice.
Registered dietitians
Provide structured dietary guidance and personalised nutrition plans.
Endocrinologists or metabolic specialists
May be involved when hormonal or metabolic conditions contribute to weight gain.
Specialist obesity or bariatric services
May be considered for severe obesity or when surgical options are being assessed.
Psychologists or psychiatrists
Can support people where emotional, behavioural or psychological factors influence eating patterns or weight.
How can overweight and obesity be managed?
Management usually involves a combination of approaches, tailored to the individual:
- Lifestyle-based interventions. Dietary changes, physical activity, sleep optimisation and behavioural strategies form the foundation of weight management.
- Medical treatment. In selected adults, prescription medicines may be considered by a clinician as part of a structured treatment plan. These are only prescribed following a medical assessment and are used alongside lifestyle changes, not as a replacement for them.
- Surgical interventions. For severe obesity, surgical options may be considered in specialist settings after comprehensive assessment.
Medicines that may be considered in weight management
Where clinically appropriate, prescribers may consider medicines that act on appetite regulation or nutrient absorption. Whether a medicine is suitable depends on individual health factors, existing conditions and current prescribing guidance.
Examples include:
Fat-blocker medicines
Medicines containing orlistat work by reducing the absorption of dietary fat in the digestive system. Clinical studies show modest average weight loss when combined with a reduced-fat, calorie-controlled diet.
GLP-1 receptor agonists
These medicines mimic a naturally occurring gut hormone involved in appetite regulation. They may support weight loss by slowing gastric emptying and acting on appetite centres in the brain. Examples include medicines containing semaglutide, liraglutide or tirzepatide.
In large clinical studies, adults with overweight or obesity treated with semaglutide alongside lifestyle interventions experienced an average weight loss of approximately 15% over 68 weeks, compared with placebo. Individual outcomes vary and cannot be guaranteed.
Important. All medicines can cause side effects and must be used under medical supervision. They are most effective when combined with dietary and lifestyle measures. Long-term use and discontinuation effects continue to be evaluated in ongoing research.
How DoktorABC UK supports access to care
DoktorABC UK is a digital health platform that connects patients with independent, UK-registered healthcare professionals. The platform enables access to clinical assessment via a secure online process.
A clinician reviews the medical information provided and determines whether medical treatment may be appropriate based on individual health factors and medical history. If treatment is deemed suitable, a prescription may be issued by the prescriber in accordance with UK regulations.
DoktorABC UK does not itself provide medical care, issue prescriptions or dispense medicines. All clinical decisions are made by the independent prescribing healthcare professional following an individual assessment.
Summary
Overweight and obesity have complex causes and often require a structured, long-term approach. While lifestyle changes remain central to weight management, some people may benefit from additional medical support under clinical supervision. A healthcare professional can help determine the most appropriate options based on individual circumstances.
