Prescription Error Claims — Medication Mistake Compensation

Last reviewed: June 2026 · EA Personal Injury Solicitors

If a wrong drug, wrong dose, dangerous drug interaction or dispensing mistake harmed you, you may have a claim against the prescribing doctor, dispensing pharmacist or hospital. You must show the error fell below the required standard of care and caused avoidable harm. No win, no fee is available for eligible claims.

TL;DR — Quick Summary

Key Points

Prescription errors include wrong drug, wrong dose, contraindicated drug, and dispensing mistakes.
Liability may attach to the prescribing doctor, dispensing pharmacist, or hospital.
Expert evidence from a pharmacist expert is typically required.
You must prove both substandard care and that it caused avoidable harm.
Three-year limit from the error or from the date of knowledge.
No win, no fee is available for eligible claims.

Types of Prescription Error

Prescription errors can occur at several stages of the medicines process:

Prescribing errors: The doctor prescribes the wrong drug, prescribes a drug at the wrong dose, fails to check for known contraindications (conditions in which the drug should not be used), or fails to identify a dangerous interaction with other drugs the patient is taking.
Dispensing errors: The pharmacist dispenses a different drug, a different dose or strength, or a different quantity than prescribed. Labelling errors can cause patients to take medication at the wrong frequency or time.
Administration errors: In hospital settings, a nurse or healthcare assistant administers the wrong drug, the wrong dose, or administers a drug by the wrong route (for example, intravenously when it should be oral).
Monitoring errors: Some drugs require regular monitoring of blood levels or organ function. Failure to carry out or act on monitoring results can constitute negligence if it allows harm to develop that would otherwise have been avoided.

Who Bears Responsibility?

Responsibility for a prescription error depends on where in the chain the error occurred:

GP or hospital doctor: For errors in prescribing — wrong drug, wrong dose, failure to identify contraindications or interactions.
Pharmacist: For dispensing errors — wrong drug or dose handed to the patient. Pharmacists have an independent duty to check prescriptions for clinical appropriateness, not merely to dispense mechanically.
Hospital or NHS trust: As the employer of the doctor or nurse who made the error.
Pharmacy business: As the employer of the dispensing pharmacist.

Evidence Required

Prescription error cases typically require:

Your GP and hospital medical records and prescription history
The original prescription (if available) and dispensing records
Expert evidence from a pharmacist on whether the prescribing or dispensing fell below the required standard
Expert evidence from a relevant medical specialist on whether the error caused the harm you suffered

Compensation

Compensation for a prescription error claim covers general damages for pain, suffering, and loss of amenity caused by the harm, and special damages for past and future financial losses — including additional medical treatment costs, lost earnings if the harm affected your ability to work, and the cost of any care or assistance required as a result of the error.

Frequently Asked Questions

What is a prescription error?

A prescription error occurs when a mistake is made in prescribing, dispensing, or administering medication that causes harm to the patient. This includes prescribing the wrong drug, the wrong dose, or a drug that the prescriber should have known was contraindicated; dispensing the wrong medication or incorrect dose by a pharmacist; or administering the wrong drug or dose in a hospital or care setting.

Who can be liable for a prescription error?

Liability may rest with the prescribing doctor (GP or hospital doctor), the dispensing pharmacist, the pharmacy or chemist, the hospital or NHS trust, or a combination of parties — depending on where the error occurred. Each has professional duties to check their prescribing or dispensing decisions against the patient's known history, allergies, and current medications.

What harm can prescription errors cause?

Prescription errors can cause a wide range of harm, from allergic reactions and adverse drug reactions to organ damage, worsening of the underlying condition (if the wrong drug or dose fails to treat it), overdose, drug interactions, and in the most serious cases, death. The severity of harm depends on the drug involved, the patient's condition, and how quickly the error was identified.

How do I prove a prescription error caused me harm?

To succeed in a claim, you must show: (1) the prescribing or dispensing professional failed to meet the required standard of care — for example, by failing to check contraindications, allergies, or interactions, or by making a dispensing error; and (2) that failure caused the harm you suffered. Independent expert evidence (from a pharmacist expert and relevant medical specialist) is typically required.

Is there a time limit for a prescription error claim?

The usual limit is three years from the date of the error or from the date of knowledge — when you knew or ought reasonably to have known that you suffered harm as a result of a medication error. In some cases, the date of knowledge may be significantly later than the error itself if the link between medication and harm was not immediately apparent.

Published by EA Personal Injury Solicitors

Edward and Amaury Limited · SRA No. 800525

Verify the firm and its regulated people on the SRA Register. General information only; this is not legal advice.