Why Medicines in the UK Come in Blister Packs – and What’s Being Done About the Waste

Many patients with aspergillosis (or other long-term conditions) notice something frustrating when they collect prescriptions: medicines often come in tiny blister packs, with only a few tablets per box. For example, azithromycin often arrives in boxes of just three tablets. When a longer course is needed, the pharmacy has to give you several boxes – leading to mountains of card and plastic waste.

So why does the UK stick with blister packs instead of using larger recyclable bottles? And is anything being done to cut down on the waste?

Why the UK prioritises blister packs

Blister packs are not just a packaging choice – they are built into how medicines are licensed and regulated in the UK and Europe. The main reasons are:

1. Safety and tamper protection

   • Each tablet is sealed in its own compartment, so it’s clear if a dose has been tampered with.

   • Bottles are harder to secure once opened.

2. Stability of the medicine

   • Some drugs break down if exposed to moisture, air, or light.

   • A blister pack protects each tablet until the moment it’s taken, which can extend shelf-life.

3. Dosing and adherence

   • Blisters help patients (and carers) see how many doses have been taken.

   • For short antibiotic courses, blister packs help doctors prescribe “one strip = one course.”

4. Child safety

   • Blisters are harder for small children to open compared with bottles, even those with child-resistant caps.

5. Regulatory approval

   • When a company licenses a medicine, the tests are carried out on that specific packaging.

   • To switch to bottles, companies would have to repeat expensive stability tests and resubmit to the MHRA.

These factors explain why UK pharmacies almost always supply the manufacturer’s blister pack, rather than re-dispensing tablets into bottles (as is common in the US).

The problem: waste and inefficiency

While blisters have advantages, they cause problems for patients and the NHS:

• Waste of card and plastic: multiple boxes and layers of packaging for what could fit into one small bottle.

• Cost and storage: pharmacies spend time opening and combining packs; patients are left with unnecessary clutter.

• Recycling difficulties: blister packs are made of mixed plastic and foil, which are very hard to recycle in normal household systems.

What’s being done to reduce packaging waste

There is now a growing effort across the NHS, regulators, and industry to tackle this problem. Key developments include:

1. Greener NHS programme

• The NHS has pledged to reach net zero by 2040.

• Medicines are a big part of its carbon footprint, and packaging is specifically highlighted as an area for improvement.

• Suppliers will increasingly be judged on how sustainable their packaging is when the NHS decides what to buy.

2. Original Pack Dispensing (OPD) reform (England, 2025)

• From January 2025, pharmacists in England will be allowed to dispense up to 10% more or less than prescribed if it allows them to give patients the full original pack.

• This reduces the need to cut up blister strips or re-package tablets, helping both safety and efficiency.

3. Extended Producer Responsibility (EPR) for packaging (2025)

• All large companies must start reporting on the recyclability of their packaging.

• Packs that are harder to recycle (like plastic-foil blisters) will face higher fees, pushing manufacturers to redesign them.

4. Industry innovation (CiPPPA)

• A group called the Circularity in Primary Pharmaceutical Packaging Accelerator (CiPPPA) is working with the MHRA and industry to test new blister materials that are easier to recycle.

5. Pharmacy leadership

• The Royal Pharmaceutical Society and local NHS teams are producing guides for “greener pharmacies,” encouraging steps to reduce medicine and packaging waste.

What this means for patients

Right now, the small packs are still the norm – especially for antibiotics and antifungals. But over the next few years we may start to see:

• Larger, recyclable pack sizes becoming available.

• Pharmacies having more flexibility to supply original packs instead of splitting them.

• New materials being trialled to replace mixed-plastic blisters.

In the meantime, patients can:

• Return unused medicines (and their packaging) to the pharmacy for safe disposal.

• Ask their pharmacist if combining packs is possible (sometimes they can reduce excess boxes).

• Support “greener pharmacy” initiatives by raising awareness of the waste problem.

✅ In short: The UK prioritises blister packs for safety, stability, and child protection, but the waste they generate is a real issue. Change is coming slowly, through NHS net zero commitments, new regulations, and industry projects – but for now, patients still see the frustration of multiple half-empty boxes.