Weight Loss Injections in Medway: Mounjaro, Wegovy, and How to Get Them Safely

What are weight loss injections?

Weight loss injections belong to a group of medicines that copy the hormones your gut releases after you eat. These hormones tell your brain you are full and slow down how quickly your stomach empties, so you feel satisfied for longer and eat less overall. Most are given as a small once-weekly injection under the skin, using a pre-filled pen.

You may have seen a few brand names in the news:

• Mounjaro (tirzepatide) — works on two gut hormone receptors (GIP and GLP-1) and has produced the largest average weight loss in trials.
• Wegovy (semaglutide) — a GLP-1 medicine, the same active ingredient used in some diabetes treatments but at a dose licensed specifically for weight management.
• Saxenda (liraglutide) — an older, daily-injection option that is now used less often since the weekly medicines arrived.

All of these are prescription-only medicines in the UK. They are not diet supplements, and they are not something a pharmacist can hand over without a proper assessment.

How well do they actually work?

In clinical trials, people using these medicines alongside diet and lifestyle support lost significantly more weight than those making lifestyle changes alone — often in the region of 15% to 20% of their starting body weight with the strongest treatments. That is a meaningful result, and for many people it is enough to improve blood pressure, blood sugar, and joint pain.

But two things are worth being honest about. First, results vary a lot from person to person. Second, the medicine does the appetite part — it does not build the habits. The people who keep the weight off are the ones who use the appetite reduction as a window to change how they eat, move, and sleep.

NHS vs private: how to get them in 2026

This is the question we are asked most. There are two routes, and they are very different.

The NHS route

The NHS is rolling out weight loss medication in stages, starting with the people who stand to benefit most — generally those with a higher BMI who also have weight-related health conditions such as type 2 diabetes, high blood pressure, or heart disease. The eligibility criteria are being widened over time, but access is still limited and waiting lists can be long. NHS treatment is usually arranged through your GP or a specialist weight management service.

The private route

Because NHS access is limited, most people currently using these medicines pay for them privately after a health assessment. A responsible private service should never just post you a pen. Regulators have tightened the rules: providers must confirm your BMI, review your medical history and other medicines, and carry out a proper consultation before prescribing — not simply tick a box on a website.

In short: the NHS route is free but restricted and slower; the private route is quicker and open to more people but you pay, and quality of care varies enormously between providers. Choosing a regulated, face-to-face service matters more than finding the cheapest pen online.

Who should not use weight loss injections

These medicines are not right for everyone. You should not use them, or should take extra care, if you:

• are pregnant, breastfeeding, or trying to conceive
• have had inflammation of the pancreas (pancreatitis) or certain thyroid conditions
• have type 1 diabetes, a history of an eating disorder, or a very low BMI
• take other medicines that could interact — this is why a full medicines review matters

One point that catches people out: tirzepatide can reduce how well the contraceptive pill is absorbed around the time you start it or increase the dose. If you use the pill, you may be advised to add a barrier method such as condoms for a few weeks. A good assessment will flag this for you.

Never buy weight loss injections from social media sellers or unregulated websites. Fake and mis-dosed pens are circulating, and without a proper assessment you have no safety net if something goes wrong.

Side effects to expect

The most common side effects are digestive: nausea, vomiting, diarrhoea, constipation, and reflux. They are usually worst in the first few weeks and when the dose goes up, and they tend to settle as your body adjusts. Starting low and increasing the dose slowly helps a great deal, which is another reason not to rush the process.

Because you eat and drink less, dehydration is common — sip fluids regularly. Rarely, these medicines can cause more serious problems such as pancreatitis. If you develop severe, persistent tummy pain that spreads to your back, stop the medicine and seek urgent medical help.

Why support matters — it's not a magic bullet

When you stop the injections, appetite returns, and weight often comes back if new habits are not in place. Rapid weight loss can also mean losing muscle as well as fat, so protein intake and strength activity matter. That is why these medicines work best inside a supported programme, with regular check-ins, nutrition advice, and monitoring of your blood pressure and general health along the way.

How Medway Pharmacy in Gillingham can help

Our weight management service offers a confidential health assessment, a review of your BMI and goals, and access to treatment options where they are clinically appropriate — with ongoing check-ins rather than a one-off transaction. We can also carry out a blood pressure check and talk through other steps, from nutrition to stopping smoking, that lower your long-term health risks.

We are on Canterbury Street in Gillingham and usually open 7:30am to 10pm, seven days a week (excluding bank holidays). Weight loss medication is not something we book online — the right first step is a conversation. Pop in or get in touch and our team will talk you through whether it is a sensible option for you.