Close the Loop : Your Complete Guide to the Wegovy PenCycle Scheme

What Is Wegovy — And Why Does Pen Disposal Matter?

Wegovy (semaglutide) is a once-weekly weight loss injection approved by the MHRA and recommended by NICE for eligible adults managing obesity. It belongs to a class of medicines called GLP-1 receptor agonists, which mimic a natural hormone to reduce appetite and slow digestion, helping patients lose an average of 15–20% of their body weight when combined with a reduced-calorie diet and exercise.

Each Wegovy prescription provides a month’s supply of pre-filled FlexTouch injection pens. At lower doses, each pen contains four weekly doses; at the newer 7.2mg maximum dose, each pen is single-use. Either way, the result is a steady stream of used plastic medical devices — and until recently, there was no sustainable way to deal with them. Standard household recycling bins cannot accept medical plastics. Sharps bins handle the needles, but the pens themselves have historically ended up in landfill or incineration. Across the UK, that amounts to around 23 million pre-filled injection pens every year.

Introducing PenCycle: The UK’s First Pen Recycling Scheme

PenCycle is a free recycling initiative launched by Novo Nordisk — the manufacturer of Wegovy — and is the first scheme of its kind in the UK. It was piloted in 2021 across Greater Manchester, Leicestershire and Rutland, and Greater Glasgow and Clyde, before rolling out nationally in October 2022.

The scheme is part of Novo Nordisk’s wider Circular for Zero sustainability strategy, which aims to eliminate the company’s environmental impact by 2030. PenCycle ensures that used Wegovy and Saxenda pens are returned, shipped back to Denmark on existing cargo routes, and processed at a specialist recycling plant where up to 85% of the materials in each pen — including high-quality plastics and glass — are reclaimed and given a new purpose. The recycled materials have already been transformed into everyday items such as office chairs and lamps.

The scheme aligns directly with the NHS Net Zero commitment, which calls on the entire UK health sector to reduce its environmental footprint. Novo Nordisk has formally joined the NHS Net Zero International Leadership Group in support of these ambitions.

How to Use PenCycle: A Step-by-Step Guide

Participating in PenCycle is genuinely simple. Here is how it works:

1.    Remove the needle safely  Always remove and dispose of the needle separately in a sharps container before placing the pen in your PenCycle box. Never put needles into the PenCycle return box.

2.    Request your free PenCycle return box  Order a free return box directly from pen-cycle.co.uk, or ask your pharmacist. Some online pharmacies, including Happy Pharmacy, automatically include a PenCycle box with qualifying Wegovy orders.

3.    Fill the box with your empty pens  Each PenCycle return box holds up to ten empty pens. Store your used (needleless) pens in the box until it is full.

4.    Return the box  You have two convenient options: post it back using the pre-paid Royal Mail freepost label included in the box, or drop it off at one of more than 3,700 participating UK community pharmacies.

5.    That’s it  Novo Nordisk handles everything from there. Your pens travel back to Denmark for recycling — you have done your part.

What Can — and Cannot — Go in Your PenCycle Box?

It is important to know what the scheme does and does not accept. PenCycle is designed specifically for pre-filled Novo Nordisk FlexPen and FlexTouch devices — which includes your Wegovy pens and Saxenda pens. It does not accept pens from other manufacturers, insulin vials, pumps, or any other medical devices. Needles must always be removed and disposed of in a sharps bin first.

Why It Matters: The Environmental Impact of PenCycle

The numbers behind the scheme are striking. Before PenCycle, almost all of those 23 million pens distributed annually in the UK ended up either incinerated — producing harmful gases and consuming significant energy — or in landfill, where non-biodegradable plastics can persist for hundreds of years.

The Pharmaceutical Journal reported that over 200,000 pens had been returned through the scheme as of August 2023, saving approximately two tonnes of plastic waste.⁶ Novo Nordisk’s own projections suggest the scheme has the potential to prevent 56 tonnes of plastic waste annually once participation reaches scale.

UK PEN WASTE SCALE — ANNUAL ESTIMATES

Source: Pharmaceutical Journal 2023; Novo Nordisk PenCycle projections. Full scheme uptake could recycle 75%+ of eligible pens.

PenCycle, Happy Pharmacy, and Your Weight Loss Journey

At Happy Pharmacy, we believe that responsible weight loss treatment goes beyond the prescription. Safety, sustainability, and personal support are all part of the service we offer as a GPhC-registered online pharmacy.

When you order Wegovy through Happy Pharmacy, you receive not only clinician-assessed treatment with full ongoing support, but also clear guidance on how to dispose of your pens responsibly using the PenCycle scheme. We encourage all of our patients to participate — it is free, straightforward, and makes a genuine difference to the environment.

Since September 2025, the General Pharmaceutical Council (GPhC) has required all online pharmacies prescribing Wegovy and other weight loss injections to conduct mandatory video consultations with patients. Happy Pharmacy has been fully compliant with these requirements from day one, ensuring that every patient receives a personal clinical assessment before treatment begins — and trusted, regulated support throughout their weight loss results journey.

The Bottom Line

Wegovy is a clinically proven, NICE-approved treatment that is transforming weight loss for thousands of people across the UK. The PenCycle scheme means that the environmental cost of that treatment no longer has to be counted in plastic waste. By returning your used pens — for free, with no extra effort — you can take an active, personal role in responsible, sustainable healthcare.

It is a small action that adds up to something significant. And for Happy Pharmacy patients, it is just one more way we support you beyond the prescription — because truly personal care means caring about the whole picture.

Blog medically reviewed by : Palvinder Deol, GPhC Registered Pharmacist, 31 March 2026

REFERENCES

1.     National Institute for Health and Care Excellence . Semaglutide for managing overweight and obesity

2.     Novo Nordisk . Circular for Zero sustainability strategy. 

3.     The Pharmaceutical Journal . Patients return 200,000 injection pens through recycling scheme. 

4.     General Pharmaceutical Council . Guidance on prescribing weight management medicines online. 

This blog is for informational purposes only. Always seek advice from a qualified healthcare professional before starting any medication.