In short: Weight is shaped by much more than willpower. Hormones, sleep, stress, medicines, medical conditions and your environment all play a part. Effective support starts with a proper assessment, focuses on sustainable eating and activity changes, and may include blood tests or, for some people, a prescription medicine if a prescriber decides it is clinically appropriate. Ready Health offers this kind of support to people in Horwich, Wigan, Chorley, Bolton and Standish.

This guide, written by a Ready Health prescribing pharmacist, explains why losing weight can be difficult, what a medically led weight management plan involves, and how UK guidance from NICE and the NHS shapes the options available.

Why is losing weight so hard for some people?

Many people who struggle with their weight have already tried several diets. Difficulty losing weight is common, and it is not a personal failing. Body weight is regulated by a complex system involving appetite hormones, the brain and the gut, and the body tends to defend its weight by increasing hunger when you eat less.

Factors that can make weight harder to manage include:

Medical conditions such as an underactive thyroid (hypothyroidism), polycystic ovary syndrome (PCOS) or insulin resistance
Some medicines, including certain antidepressants, antipsychotics, steroid tablets and some diabetes treatments
Short or poor-quality sleep and ongoing stress
Perimenopause and menopause, which can change where fat is stored
Emotional or habitual eating patterns
Busy routines, shift work and a food environment full of energy-dense, heavily processed food

Because these causes differ from person to person, a one-size-fits-all diet plan often does not work for long.

What does a medically led weight management plan involve?

NICE guidance on overweight and obesity (NG246) recommends a person-centred approach that avoids stigma and looks at the whole person. In practice, a good plan usually includes:

A full consultation covering your medical history, current medicines, eating patterns, activity, sleep, mood and goals
Measurements such as body mass index (BMI) and waist-to-height ratio, which gives a better picture of health risk linked to fat around the middle
Blood tests where appropriate, for example to check thyroid function, blood sugar (HbA1c), cholesterol, liver function or vitamin levels
Realistic eating and activity changes that fit your life, rather than extreme or very restrictive diets
Regular follow-up to review progress, side effects and motivation

What is a realistic weight loss goal?

Losing even 5 to 10% of your body weight can bring meaningful health benefits, such as lower blood pressure, better blood sugar control and less strain on your joints. NHS advice suggests aiming for a gradual loss of around 0.5 to 1kg (1 to 2lb) a week. Slower, steady progress is generally easier to maintain than rapid loss.

Are weight loss medicines an option?

For some adults, a prescription medicine may be considered alongside a reduced-calorie diet and increased physical activity. These are prescription-only medicines, so a prescriber must assess you before deciding whether any treatment is suitable. They are not appropriate for everyone, and they are not a replacement for lifestyle changes.

Medicine type	How it works	Points to know
GLP-1-based medicines (for example semaglutide or tirzepatide)	Act on appetite hormones to help you feel fuller and less hungry	Common side effects include nausea, vomiting, diarrhoea and constipation. Rarer risks include pancreatitis and gallbladder problems. Not for use in pregnancy or breastfeeding.
Orlistat	Reduces the amount of fat absorbed from food	Can cause oily stools and urgency, especially with fatty meals

The MHRA has issued important safety advice for people using GLP-1 medicines. Anyone who could become pregnant should use effective contraception, and tirzepatide can reduce how well the oral contraceptive pill works in some people. You should also tell your care team, including an anaesthetist, if you are taking one of these medicines before any operation. Only obtain these medicines from a regulated UK pharmacy or prescriber after a proper consultation.

On the NHS, access to weight loss medicines depends on NICE criteria and local services, and is being introduced in phases. A private consultation can be another route to discuss options, but whether any medicine is prescribed is always a clinical decision.

Weight loss support in Horwich and nearby: what to expect

If you live in Horwich, Wigan, Chorley, Bolton or Standish, your first appointment at Ready Health is a conversation about you: your history, your challenges and what you want to achieve. We may suggest blood tests, agree practical goals and arrange follow-up reviews. If a prescription medicine is discussed, the prescriber will explain the potential benefits, side effects and alternatives so you can make an informed choice.

Frequently asked questions

Do I need a GP referral for private weight management support?

No, you do not usually need a referral. We may ask for permission to share relevant information with your GP so your care is joined up and safe.

Can a blood test explain why I cannot lose weight?

Blood tests can identify conditions that affect weight, such as an underactive thyroid or raised blood sugar. Many people have normal results, but tests can still help guide safe treatment choices.

Is a weight loss medicine right for me?

Only a prescriber can decide this after assessing your BMI, health conditions, current medicines and any reasons a medicine may not be safe. Medicines work best alongside changes to diet and activity.

What happens when treatment stops?

Weight often returns after weight loss medicines are stopped, particularly if eating and activity habits have not changed. A good plan includes support for keeping weight off in the long term.

Key takeaways

Difficulty losing weight is common and has many biological and lifestyle causes.
A personalised plan starts with a full assessment and, where useful, blood tests.
Losing 5 to 10% of body weight can improve health.
Prescription medicines may help some adults, but a prescriber must decide whether they are suitable.
Long-term habits matter most for keeping weight off.

Sources and further reading

Last reviewed: October 2026 by Shamir Patel, Independent Prescribing Pharmacist, Ready Health. This article is general information and does not replace advice from your own clinician.

If you are in Horwich or the surrounding area and would like a personalised plan, you can book a weight management consultation at Ready Health. A clinician will assess your needs and talk you through the options that may suit you.