Medication given to the wrong client: what the nurse does first

Assess the client who received the drug

A medication error is any preventable event that may cause inappropriate medication use or patient harm while the medicine is in the control of a professional or patient. Once a wrong-patient error is recognised, the immediate risk is to the client who received a drug never prescribed for them. That person might be allergic, already taking an interacting medicine or vulnerable to its expected effects.

Go to the client and assess them first. Check airway, breathing, circulation and level of consciousness, take a full set of vital signs, and look for effects linked to the drug, such as sedation after an opioid, hypotension after an antihypertensive or hypoglycaemia after insulin. Ask how they feel and review their allergies and current medicines so the provider has the information needed.

Notify the provider and monitor

Report promptly to the provider with the drug, dose, route and time given, the client's current findings, allergies and relevant medicines. The provider decides whether monitoring, an antidote, laboratory tests or transfer to a higher level of care is needed. The nurse carries out those orders, increases observation and informs the charge nurse so the assignment can absorb the extra workload.

Do not forget the client the medicine was meant for. They have now missed a prescribed dose, and depending on the drug, that gap may matter. The provider for that client needs to know, and a new dose is given only after a fresh order and full checking. Attempting to correct the error quietly by giving a second dose is not acceptable.

Report, disclose and learn from the error

Once the client is safe, complete the facility incident report with objective facts. The incident report is a quality tool kept separate from the medical record, which instead documents the drug given, assessment findings, provider notification and the response. Serious errors may also be reported through national programmes such as the ISMP or FDA reporting systems.

Professional codes expect nurses to act immediately to put things right and to explain fully and promptly what happened, with an apology, to the person affected. Patients value hearing what went wrong, how harm will be minimised and how recurrence will be prevented. Disclosure usually involves the provider and follows facility policy, and the system review that follows looks beyond individual blame.

What can be delegated and what must not happen

Assistive personnel can take repeat vital signs on the affected client once the nurse has assessed them and set clear reporting limits, and they can help observe the room. They cannot judge whether the client is reacting to the drug, contact the provider on the nurse's behalf or decide when monitoring can stop.

Several responses are never appropriate: hiding the error, altering the medication record, asking another nurse to keep quiet or waiting to see whether the client develops symptoms before reporting. Each delays treatment and undermines the learning that prevents the next error. Honest, prompt reporting protects both clients and supports a fair review of the nurse's practice.

Apply the order to a hypothetical question

A hypothetical nurse realises that a dose of oral metoprolol intended for one client was given to the roommate, who has no beta blocker on their record. The options are to complete an incident report first, notify the nurse manager, assess the roommate's pulse and blood pressure, or tell the intended client their dose will be late.

Assessing the roommate is the strongest first action because the immediate danger is bradycardia or hypotension in that client. Notifying the provider and manager follow closely, and the intended client's plan is addressed with their provider. The incident report matters but comes after safety. Barcode scanning and two identifiers prevent these errors, but cannot fix one already made.

Sources and further reading

NCC MERP: About medication errors. Definition of a medication error and national reporting through the ISMP and FDA MedWatch programmes.

AHRQ PSNet: Disclosure of errors. What patients value in disclosure, apology and early communication-and-resolution approaches.

AHRQ PSNet: Medication errors and adverse drug events. Barcode medication administration to confirm the correct patient and system flaws behind administration errors.

Nursing and Midwifery Council: The Code. Duty to act immediately to put right harm and to explain fully and promptly what happened, with an apology.