Patient information leaflets are meant to help people use their medicines safely. But many people find them confusing, overwhelming or even frightening. If a document designed to keep people safe ends up putting them off their treatment, it’s a sign that something isn’t working.

These leaflets appear in every medicine pack. They explain what the medicine is for, how to take it, and what side-effects to look out for. They should make things clearer. But a growing body of research shows they often do the opposite.

One of the biggest problems is readability. Information leaflets are written at a reading level far higher than most people can comfortably understand. An analysis of leaflets for commonly used medicines found that none met the recommended reading age of around 12 years, and more than half were classed as difficult to read. Only a small minority used plain, accessible language.

When comparing leaflets from the UK, Germany and Turkey, researchers found that they all had the same problem: long, tangled sentences stuffed with jargon. If instructions are hard to follow, people may take the wrong dose, use the medicine incorrectly or stop taking it altogether.

Finding one crucial piece of information can be surprisingly difficult when you are ill, worried or simply trying to work out what to do. Important details about dosing or warnings can be buried in long paragraphs or surrounded by unfamiliar medical terms. When people can’t easily find what matters, they may rely on guesswork or stop reading altogether.

Leaflets tend to list every possible side-effect, ranging from the mild to the vanishingly rare, all with no sense of how likely each one actually is. These lists are usually presented without context. When people see a long list of possible harms, they tend to overestimate danger and assume rare problems are more likely than they really are. This can lead to anxiety, avoidance of treatment or unnecessary worry.

Design also plays a role. Many leaflets use small fonts, dense blocks of text and limited white space. For older adults, people with visual impairments or anyone reading in a hurry, this makes the information harder to absorb. Even simple instructions can become difficult when the layout is cluttered or the print is tiny. Poor layout is one of the most common complaints from patients.

The rise of self-diagnosis and self-treatment adds another layer of complexity. People increasingly search online for health advice, compare medicines on social media and buy treatments from websites rather than pharmacies. When they do this, the leaflet may be the only formal source of guidance they receive. If that leaflet is confusing or unclear, the risk of misuse increases. People often rely on influencers or unverified websites for advice, which can compound misunderstandings.

How to fix the problem

Despite these problems, information leaflets remain an important safety tool. They provide essential details that cannot always be covered in a short conversation with a pharmacist or doctor. The challenge is to make them genuinely useful for the people who rely on them.

There are several ways leaflets could be improved. One is to simplify the language. Plain writing avoids long sentences, technical terms and unnecessary detail. It focuses on what people need to know to use their medicine safely. Plain language materials improve understanding and confidence, especially for people with lower literacy levels.

Another improvement is better structure. Short sections, clear headings and bullet points make information easier to scan. Visual tools can also help. For example, simple graphics can show how common or rare a side-effect really is. This gives people a clearer sense of proportion and reduces unnecessary fear.

Consistency matters too. Urgency cues such as “seek medical help immediately” or “talk to your doctor” should be used in a standard way so readers can understand the difference between urgent and routine advice. Inconsistent wording often leaves people unsure about how serious a warning is.

Digital options offer new possibilities. Online versions of leaflets could allow people to adjust font size, switch to high-contrast modes or listen to audio versions. Interactive features could highlight the most important information or provide short videos explaining how to take the medicine. These tools could make information more accessible for people with visual impairments, learning difficulties or limited English proficiency.

But digital solutions are not perfect. Not everyone has reliable internet access, a mobile phone or the confidence to navigate online health information. Digital poverty and digital skills gaps mean that printed leaflets still matter. Any future approach needs to combine improved printed materials with optional digital enhancements, rather than replacing one with the other.

Information leaflets only work if they’re written for real people, in real situations – not for an imaginary reader with unlimited time and patience. They should help readers feel informed, not overwhelmed. They should support safe use, not create fear. And they should be clear enough that anyone, regardless of background or health literacy, can understand how to take their medicine safely.