Last updated 29th October 2025. The aim of taking medication is generally to improve a health condition. Therefore, medication calculation errors can be very disconcerting. There can be serious effects on the lives of those involved. Sufferers can often feel isolated and incur financial costs during the recovery process. You may wonder what steps you can take to exercise your legal rights.
Contact an expert member of our enquiries team today for straightforward advice regarding medication calculation error claims. They can determine whether you are eligible to make a claim and what factors are likely to affect your medication error payout. You could even be able to work with one of our solicitors who do not charge upfront or ongoing fees for their services.
Commonly Asked Questions
- What are the consequences of medication errors? People are impacted in a variety of ways. Common examples of harm include allergic reactions, untreated health conditions and overdoses.
- How common are medication error claims? There were 591 medical negligence claims made against the NHS between 2023 and 2024 in relation to medication errors.
- Can I claim against a pharmacist? Yes, as pharmacists are medically trained professionals, you can claim against them if they negligently treat you.
- Can I add the cost of private medical treatment to my claim? Yes, this cost could be recovered under special damages.
- Can I claim against the NHS? Yes, medical professionals working in the NHS owe the same duty of care as private practitioners.
To discuss your medication error claim, you can contact one of our advisors today.
4.8 (466 reviews) What Medication Calculation Errors Could You Claim For?
The effects of medical negligence can vary on a case-by-case basis. Some patients may be more severely affected than others. However, even less severe injuries or illnesses caused by calculation errors involving medication could make you eligible to receive compensation.
It’s just possible that the amount awarded to you could be worth less than someone who has suffered in a greater way than you.
It also doesn’t matter whether you received private healthcare, or if you were treated at an NHS facility. Healthcare professionals in either setting still owe you the same duty of care. Therefore, you can still claim regardless.
Healthcare professionals should treat their patients with the minimum standard of care and skill. If they provide care that falls below this, they could be seen as negligent. if the breach of duty of care causes the patient to suffer undue physical or mental harm, they could claim.
Clinical Negligence Statistics
The NHS keeps track of how much it spends each year on costs associated with medical negligence claims made against them. They release the figure each year in the NHS Resolution Annual Report. The 2020/21 report shows that they spent £2,209 million on these associated costs.
You can see how this total was broken down in the graph below. However, it’s important to note that not all the claims involved with this figure relate to medication calculation errors. They can be
medical negligence claims from all areas of the NHS including hospitals, GP surgeries, dental claims.
Causes Of Medication Calculation Errors
This section focuses on possible reasons errors such as this could take place. All of the causes below can lead to injuries of varying severity. Medical negligence can even be fatal. A loved one can still make a claim on behalf of the deceased.
Overprescribing
This is when the dose that a patient receives is too high for them. Certain calculations need to be made for certain medications so that the patient is administered an appropriate amount.
Factors such as the patient’s age and weight can affect how this calculation is made, and the dosage they should receive.
Underprescribing
This can be a cause if the correct medication is administered but at too low of a dose. Alternat
ively, it could be the correct dosage, but of the wrong medication.
If a patient doesn’t receive the correct dosage of medication, then their condition could become worse.
Other Factors
There could be certain administrative errors that factor into medication calculation errors. For example, a certain dosage being administered may not have been properly recorded. As a result, the patient could receive double the amount of medication they should.
Why Do Medication Calculation Errors Happen?
Miscalculations can happen for a number of reasons. For example, it’s possible that the nurse or doctor who made the calculation was not focused on their work. Alternatively, the hospital management may be aware that they are short on staff and that current healthcare professionals are having to work extended hours.
Tiredness can lead to mistakes, but the negligent behaviour in this instance may lie with the management for not hiring enough staff so that appropriate breaks and time off can be taken.
How To Claim For Drug Calculation Errors And Their Consequences
Drug error claims can be made easier by taking certain steps. We’ve listed some of the more common ones in this section.
Inform Those In Charge
Whether privately-owned or run by the NHS, the medical facility should have a complaints procedure. You should tell them how you have been affected by the medication calculation error.
This way, they can investigate what happened. They may even offer you an early settlement. We advise you to seek legal advice before accepting an offer of any kind. You could be owed more than you realise and can’t claim if you accept a settlement first.
Gather Evidence
You’ll need to be able to prove that medical negligence caused or worsened your injuries or illness. Acquiring proof such as your medical records is a good example of this. You may also be required to attend an independent medical assessment at a facility other than the one where you were injured. However, this can be arranged so it is local to you.
Seek Legal Advice
If you choose to enlist legal help, your lawyer could assist you and offer guidance throughout the process. This could make the experience a less stressful one.
Get in touch today if this is something you’re interested in.
Damages Awarded For Harmful Medication Calculation Errors
Legal professionals may use a publication called the Judicial College Guidelines (JCG) when working out an appropriate value to award you for your physical and mental injuries. This figure is called general damages.
We’ve included some example entries from the JCG in the table below to give you a better idea of how injuries can be valued. Please note that the first entry has not come from the JCG.
| Injury | Description | Amount |
|---|---|---|
| Multiple injuries with costs | Multiple types of harm resulting in financial impact | Up to £500,000+ |
| Bowels | (b) Dependence on colostomy due to loss of function | Up to £183,190 |
| Arm | (E) (iii) Amputation below the elbow | £117,360 to £133,810 |
| Hearing | (b) total deafness | £110,750 to £133,810 |
| Kidney | (b) significant future risk | Up to £78,080 |
| Brain damage | (d) Less severe | £18,700 to £52,550 |
| Digestive system | (b) (ii) Illness with pain, fever, some lasting incontinence | £11,640 to £23,430 |
| Arm | (d) Simple forearm fractures | £8,060 to £23,430 |
| General psychiatric damage | (c) Moderate | £7,150 to £23,270 |
You may also be awarded special damages. These are costs that have arisen as a direct result of your injuries. You will need proof to back them up. Examples include:
- Loss of earnings
- Additional care costs
- Medical expenses
- Travel costs
Speak to us today to find out more or to have your claim valued for free.
Discuss Your No Win No Fee Medication Calculation Errors Claim
All of our solicitors work with their clients on a No Win No Fee basis. This means that if you have a strong, valid claim, an arrangement such as this will be made available to you.
What it means is that you are not required to pay your lawyer their fee if your claim is not successful. You are only obligated to pay them the fee if they help you win your claim and you are awarded compensation. Then, their fee is covered by a small percentage taken from your settlement. You will be aware of this fee ahead of time, and it is capped by law.
Reach out today to see if you could make a No Win No Fee claim, and reduce the personal financial risk that hiring legal help can present.
- Call us on 0800 073 8804
- Speak to us about your claim online
- Use the pop-up window in the corner
Learn More About Medication Error Claims
Follow the links below for more information.
Our general guide on how to claim for medical negligence.
What to do in cases of wrong medication in a care home.
Read about wrongful death claims
A legally-appointed litigation friend could claim on your behalf.
NHS guide for coping with grief and bereavement.
Read about the role of the General Medical Council (GMC).
We can help you understand more about medication calculation errors if you get in touch today.
Written by Bibby
Edited by Victorine
