Are Weight Loss Injections Worth the Cost? A Guide for UK Patients

In recent years, weight loss injections have gained huge popularity among people looking for medical help to shed excess weight. 

With celebrity endorsements, NHS trials, and widespread discussion on social media, they’re often seen as a “miracle” solution. 

But what exactly are these injections, and how much do they really cost?

What Are Weight Loss Injections?

Weight loss injections are prescription medications delivered via injection (usually into the abdomen or thigh) that help reduce appetite, regulate blood sugar, or slow digestion. The most commonly used are:

Saxenda (liraglutide) – a daily injection

Wegovy (semaglutide) – a weekly injection

Ozempic (semaglutide) – primarily prescribed for type 2 diabetes, but used off-label for weight loss

These medications are part of a class of drugs called GLP-1 receptor agonists, which mimic a hormone that helps control blood sugar and appetite.

Who Can Get Them?

They’re not suitable for everyone. In the UK, weight loss injections are typically prescribed to:

People with a BMI over 30, or

Those with a BMI over 27 who also have weight-related health conditions like type 2 diabetes or high blood pressure.

Some NHS patients may qualify through specialist weight management services, though availability is limited and subject to strict criteria.

How Effective Are They?

Clinical trials have shown that these injections can help people lose up to 15% of their body weight over several months, especially when combined with diet, exercise, and behavioural support.

How Much Do They Cost in the UK?

Here’s a rough guide to current private prices as of mid-2025:

Saxenda

Pack of 5 pens: £60–£75 per pen

Monthly cost: £240–£375

Requires daily injection

Wegovy

Weekly injection

Monthly cost: £195–£300 depending on dose

Currently available privately in the UK and increasingly prescribed on the NHS for eligible patients

Ozempic (off-label use)

Weekly injection

Monthly cost: £150–£250

In short supply due to high demand

Are There Any Side Effects?

Yes. Common side effects include:

Nausea or vomiting

Diarrhoea or constipation

Headaches

Low appetite

Serious side effects are rare but include pancreatitis, gallbladder issues, or thyroid tumours (in animal studies).

Are They Right for You?

Weight loss injections can be a powerful tool, but they’re not a quick fix. They work best when part of a comprehensive lifestyle change, supported by dietitians, GPs, or weight management coaches.

Before starting any injection, speak with your GP, pharmacist, or private weight loss clinic. Never purchase these medications from unregulated online vendors – there have been counterfeit and dangerous versions reported in the UK.

Interested in Starting?

Some of the UK’s most well-known providers include:

Superdrug Online Doctor

Lloyds Pharmacy Online Doctor

The Slimming Clinic

NHS Tier 3 Weight Management Services (eligibility applies)

If you’re thinking about using weight loss injections, weigh up the costs, benefits, and risks. They can be an excellent support for the right candidate – but make sure you’re doing it safely and sustainably.