Do You Actually Know What You're Taking? A Patient's Guide to Safer, Smarter Prescribing

Pick up a prescription bag from any UK pharmacy and you will likely find a box, a leaflet, and a label. What you may not find is a satisfying answer to the most fundamental question a patient can ask: why am I taking this?

For many people — particularly those managing multiple long-term conditions — that question goes unasked for months or even years. Medicines are renewed at repeat prescription reviews, added in response to new symptoms, and occasionally forgotten about entirely. This is not a criticism of patients. It reflects a healthcare system under considerable pressure, where consultations are short and the assumption is often that if a prescription has been issued, the patient must understand it.

Frequently, they do not. And the consequences can be serious.

The Scale of Medication-Related Harm in the UK

Polypharmacy — the concurrent use of multiple medicines — is increasingly common as the population ages and the burden of chronic disease grows. The NHS estimates that around 15 per cent of adults in England take five or more medications. For those over 65, that figure is considerably higher.

Medication-related harm is one of the most preventable causes of hospital admission in the United Kingdom. A 2018 report commissioned by NHS England found that approximately 237 million medication errors occur annually across primary and secondary care, with around 712 deaths directly attributable to them each year. Many more cause significant but non-fatal harm.

These are not simply clinical statistics. They represent real patients who, in many cases, were not equipped with the information they needed to take their medicines safely or to recognise when something was going wrong.

The Questions Every Patient Should Be Asking

The consultation room can feel like an intimidating place to slow things down and ask questions. There is often an unspoken social pressure to accept the prescription, thank the doctor, and leave. Resisting that pressure is not impolite — it is essential.

When a new medicine is prescribed, or when an existing prescription is renewed, consider asking:

• What is this medicine for, and how does it work? Understanding the mechanism — even in broad terms — helps you recognise whether it is doing what it should.
• How and when should I take it? Timing, food interactions, and whether to take it with water or avoid certain drinks (grapefruit juice, for example, interacts with a surprising number of common medicines) all matter.
• What are the most common side effects, and what should I do if I experience them? Not every side effect requires stopping the medication, but some do.
• How will we know if it is working? This is particularly important for medicines prescribed for long-term conditions such as hypertension or depression, where the therapeutic effect is not immediately obvious.
• Is there anything I should not take alongside this? This includes over-the-counter medicines, supplements, and herbal remedies — all of which can interact with prescription drugs.
• How long will I need to take it? Some prescriptions are intended to be short-term; others are indefinite. Knowing which applies to you helps you engage meaningfully at reviews.

Your GP or prescribing nurse is obliged to provide this information in a form you can understand. If you leave a consultation unclear on any of these points, it is entirely appropriate to ask again, or to follow up with the surgery.

Your Pharmacist Is an Underused Resource

The community pharmacist is one of the most accessible and underutilised healthcare professionals in the NHS. Unlike GPs, pharmacists are available without an appointment, and they are highly trained in the clinical pharmacology of the medicines they dispense.

If you are uncertain about a prescription — whether it is new or one you have been taking for some time — your pharmacist can:

• Explain what the medicine does and how to take it correctly
• Check for potential interactions with other medicines or supplements
• Advise on what to do if you miss a dose
• Identify whether a side effect you are experiencing is likely to be medicine-related
• Refer you back to your GP if something appears clinically significant

Many pharmacies in England also offer the NHS Medicines Use Review (MUR) and New Medicine Service (NMS), which provide structured consultations for patients on multiple medicines or those starting a new treatment for a long-term condition. Ask your pharmacist whether you are eligible.

When It Is Appropriate to Question a Prescription

Challenging a prescription is not the same as refusing medical advice. It is an act of informed engagement — and it is one that clinicians should welcome.

There are several circumstances in which raising a question is not only reasonable but advisable:

• You have been prescribed something you have reacted to before. Always inform your prescriber of any known allergies or adverse reactions, and confirm that these are recorded accurately in your notes.
• A new prescription appears to duplicate something you are already taking. This can happen when care is shared between a GP, hospital consultant, and other specialists, particularly if communication between teams has been incomplete.
• You have read the patient information leaflet and something concerns you. Leaflets are written to be comprehensive rather than alarming, but if something gives you pause, discuss it rather than dismissing it.
• You have been on a medicine for a long time with no formal review. NICE guidance recommends regular structured medication reviews, particularly for older patients and those on multiple medicines. If you cannot recall the last time your prescriptions were reviewed in any meaningful way, it is reasonable to ask for one.

Building a Shared Record of Your Medicines

One of the most practical steps any patient can take is to maintain an up-to-date personal medicines list. This should include every prescription medicine, over-the-counter product, vitamin, and supplement you take regularly. Bring this list to every consultation, every hospital appointment, and every trip to the pharmacy.

This seemingly simple habit has been shown to reduce prescribing errors and improve the quality of medication reviews. It also positions you as an active participant in your own care — which, in our experience at Doctors for Patients UK, tends to lead to better conversations and better outcomes.

The NHS App allows you to view your current repeat prescriptions, and your GP surgery can provide a printed medicines summary on request. Both are good starting points for building your personal record.

A Partnership, Not a Transaction

The relationship between a patient and their prescriber should be a genuine collaboration — one in which both parties understand the purpose of each medicine, are alert to potential risks, and are committed to reviewing whether the current regimen continues to serve the patient's needs.

That kind of partnership does not happen automatically. It requires patients who feel empowered to ask questions, and clinicians who create the space for those questions to be asked. At Doctors for Patients UK, we believe that informed patients are safer patients — and that the conversation about your prescriptions is always worth having, however briefly the appointment may seem to allow for it.