The Cost of Pharmaceutical Waste in the UK
How Much Does Unused Medicine Cost The NHS?
Unused medicines are a significant and often overlooked source of waste in the UK healthcare system. A 2024 report by the Department of Health estimated that unused and wasted prescription medicines in the UK costs the NHS around £300 million every year.
This equates to a significant portion of primary care spend (around 2%), and highlights the scale of the issue for both healthcare budgets and environmental sustainability.
Pharmaceutical waste in primary care can be broadly divided into three areas:
- Medicines returned to community pharmacies, which cannot be reused once they have left the pharmacy supply chain
- Unused prescription medicines kept in patients’ homes, often after treatment has changed or stopped
- NHS-supplied medicines that are disposed of unused by care homes
Why Are Prescription Medicines Wasted?
Prescription medicines go unused for many reasons.
One of the most significant is overprescribing. Some estimates suggest that around 10% of primary care prescriptions may be unnecessary, increasing costs and contributing to avoidable waste.
Medicines also go unused if a patient’s dosage changes, or if a patient develops side effects, recovers fully, or if the patient dies without finishing the course.
Under current rules, unused prescription medicines must be destroyed rather than reused, even when they are unopened and in date. While this is necessary for patient safety and regulatory reasons, it also has major financial and environmental consequences locally, nationally, and globally.
The Wider Cost of Pharmaceutical Waste
The cost of pharmaceutical waste extends well beyond the value of the medicine itself. Across healthcare systems globally, waste from expired stock, overprescribing, and unused repeat prescriptions is estimated to cost tens of billions of dollars each year.
Environmental and Secondary Costs of Pharmaceutical Waste
For the NHS, the impact is not just financial. The manufacture, transport, storage, and destruction of medicines all contribute to carbon emissions. Once returned or discarded, medicines are typically treated as clinical waste, which requires specialist disposal methods and carries an additional cost.
There are also environmental risks when medicines are disposed of incorrectly by patients. Flushing medicines down the toilet or throwing them in household waste can contribute to soil and water pollution, with potential knock-on effects for local ecosystems.
How Can Pharmaceutical Waste be Reduced?
Reducing medicine waste requires action from both healthcare professionals and patients.
The NHS advises individuals to let their GP or pharmacist know if they are having difficulty using, or have stopped using their medicine. Patients are also advised to contact a doctor if any side-effects are apparent, or if the medicine doesn’t seem right for them.
Patients are also encouraged to only order what they need when requesting repeat prescriptions. Checking what medicines are already at home before reordering can help prevent unnecessary stockpiling and reduce waste.
Healthcare providers can also play a role by reviewing repeat prescriptions regularly, reducing unnecessary prescribing, and ensuring patients understand how and when to take their medicines.
Pharmaceutical waste is not just a disposal problem — it is a financial, operational, and environmental challenge for the NHS. With an estimated £300 million lost each year in unused medicines, reducing waste presents a clear opportunity to improve efficiency while also lowering environmental harm.
Better prescribing practices, clearer communication with patients, and more mindful ordering of repeat prescriptions could all make a meaningful difference. Even small changes at an individual level can help reduce waste across the system.
For more information, see the NHS England guidance on reducing pharmaceutical waste.