What a Medication Error is Really Telling You

When a medication error is reported, the immediate priority is always the person receiving care. Are they safe? Does the GP, prescriber or emergency services need to be contacted? Has the immediate risk been managed? Have those who need to know been informed? Those first actions are critical because they focus on the person, not the process.

Once the immediate risk has been managed, the medication error investigation begins. This is where organisations have the greatest opportunity to learn. It's also where some of the most important questions remain unanswered.

The incident is recorded. Notifications are made. The investigation identifies that a medication wasn't administered, the wrong dose was given or a signature was missed. The conclusion often recommends additional training, a reminder to follow the medicines policy or a competency assessment. The investigation is then closed.

Sometimes that's the right conclusion. Quite often, it isn't.

Sometimes I finish reading an investigation and realise I still don't really know what happened. I know the outcome, but I'm left wondering how the organisation reached its conclusions. Was all the available evidence considered? Were all the people involved spoken with? Were alternative explanations explored? Or did the investigation stop at the first answer that seemed to fit?

A completed investigation isn't necessarily a good investigation.

Medication errors rarely have a single cause. More often, they're the point at which several factors come together. A member of staff may have been interrupted during the medicines round. A resident may have returned from hospital with multiple medicines changes. The pharmacy may have dispensed the wrong item or supplied medicines late. A prescription may have been amended but not communicated effectively. The MAR or eMAR may not have reflected the most up-to-date information. Documentation may have been incomplete. Several members of staff may have been involved, making it difficult to establish exactly what happened.

Sometimes, despite a thorough medication error investigation, it simply isn't possible to identify every detail with certainty. That doesn't mean the investigation has failed. The purpose of an investigation isn't to create certainty where it doesn't exist. It's to understand everything that may have contributed to the incident and identify what needs to change.

We often talk about finding the root cause, as though every medication error has one simple explanation waiting to be uncovered. Adult social care rarely works like that.

People are living with increasingly complex health conditions. Medication regimes are becoming more complicated. Staff administer medicines while responding to interruptions, supporting residents, answering questions from colleagues and dealing with the unexpected. GPs occasionally make prescribing errors, pharmacies sometimes make dispensing errors, documentation isn't always consistent. Technology removes some risks but introduces others. When several of these factors align, the opportunity for error increases.

That's why one of the most important questions isn't, "Who made the mistake?" It's, "What made this mistake possible?" One focuses on an individual; the other focuses on understanding the conditions that allowed the error to happen.

Of course, accountability matters, and where practice falls below the expected standard, that should always be addressed fairly and consistently. The difficulty comes when accountability becomes the only outcome. If the investigation ends with identifying the individual involved, there's a real risk the organisation learns very little about why the incident happened in the first place.

A learning culture isn't about avoiding difficult conversations or removing personal responsibility. It's about recognising that most incidents have more than one contributing factor. It encourages people to report concerns, near misses and mistakes because they know the organisation wants to understand what happened, not simply decide who was at fault.

Near misses are just as important. In many organisations they provide the greatest opportunity to improve because nobody has come to harm. If people don't feel confident reporting them, leaders lose valuable intelligence about where systems are becoming fragile. By the time harm occurs, those warning signs have often been there for some time.

A good investigation also looks beyond the immediate incident. Has something similar happened before? Is this becoming a pattern? Are certain medicines, times of day or processes involved more frequently? Were previous actions actually effective? Could the resident or their family help explain what happened? Has learning been shared across the organisation, or has it remained within one service?

Assurance isn't demonstrated by the number of investigations completed. It's demonstrated by being able to show that investigations have improved practice, reduced risk and strengthened the systems designed to keep people safe.

The quality of a medicines investigation often tells you as much about an organisation as the medication error itself. It tells you whether people feel able to speak up, whether leaders are curious enough to ask difficult questions and whether learning is genuinely embedded in everyday practice.

Good investigations don't just explain the past. They help prevent the next incident.

Every medication error deserves to be taken seriously. Not because every error causes harm. Not because someone always needs to be blamed. But because every error tells us something about the way an organisation works.

The next time a medication error is discussed in your governance meeting, don't just ask what happened. Ask what the incident is trying to tell you about your organisation.