Generic medicines vs brand names
Granskad av Dr Krishna Vakharia, MRCGPSenast uppdaterad av Dr Hayley Willacy, FRCGP Last updated 30 Jan 2023
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I denna serie:Medicines to keep at home
Every medicine has an approved generic name. If it is made by several companies, each will also give the medicine a brand (trade) name. So one medicine may have a generic name and also have one or more brand names. This can sometimes lead to confusion.
At a glance
Generic medicines have an approved name, and similar types of medicine often have similar names.
Brand name medicines are chosen by the company that makes them, sometimes for advertising.
Several companies can make the same generic medicine, each with their own brand name.
The colour, size, or shape of your medicine may change if the pharmacist uses a different company.
Doctors often prescribe using the generic name, which can be cheaper for the NHS.
Some medicines are always prescribed by brand name due to differences in how they work.
In the UK, generic and brand-name versions of a medicine have the same quality and action.

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What are generic medicines?
Each medicine has an approved name called the generic name. A group of medicines that have similar actions often have similar-sounding generic names. For example, fenoximetylpenicillin, ampicillin, amoxicillin och flucloxacillin are in one group of antibiotika.
What are brand name medicines?
Tillbaka till innehållMany medicines also have one (or more) brand names. This is chosen by the company that makes it. Several companies may make the same generic medicine, each with their own brand name. The name is often chosen to be memorable for advertising, or to be easier to say or spell than the generic name. For example, paracetamol is a generic name. There are several companies that make this with brand names such as Panadol®, Calpol®, etc.
The brand name is usually written most clearly on any packaging. However, you will always see the generic name written somewhere on the packet (often in small print). Some medicines only have the generic name on the packet.
The colour, size, shape, etc, of brands of the same medicine may vary depending on which company makes it. Do not be alarmed if your regular medicine seems to have changed colour or shape. It may be that the pharmacist is getting it from a different company, or the doctor has written the prescription in a generic way rather than using a brand name. However, the medicine will be the same if the generic name is the same as before.
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Combination products
Tillbaka till innehållSome tablets or pills contain a combination of medicines. Combination products are often marketed and sold with a brand (trade) name. However, the individual ingredients (the individual medicines that are combined into the one tablet or pill) will all be listed in small print on the packet. For example, a popular painkiller has a brand name of Solpadol®. This contains two generic medicines - paracetamol and codeine. It can also be prescribed under its generic name of co-codamol.
Generic prescribing
Tillbaka till innehållDoctors are encouraged to prescribe by using the name of the generic medicine. This is because:
The generic medicine name is the one doctors are trained to use. There are sometimes many brand (trade) names for one medicine. Possible confusion or mistakes are reduced if all doctors use the same names when talking about and prescribing medicines.
Generic medicines are often cheaper for the NHS. Even for medicines that you can buy, such as paracetamol, there is often a big price difference between brands.
If generic medicine is prescribed, a pharmacist can dispense any suitable (available) product to the patient. This cuts out the risk of delays in the patient receiving their treatment whilst waiting for a specific brand.
A few medicines, however, are always prescribed by the specific brand. This is because there are significant differences between the different brands in the amount you end up having in your body (bioavailability). Examples of these type of medicines are:
Some epilepsi medicines, such as lamotrigine.
Beclometasone inhalers such as Clenil® and Qvar®.
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What about quality of medicines?
Tillbaka till innehållIn the UK there are strict quality controls before a product licence is granted for brand (trade) named or generic versions of medicines. This means that a generic or brand name version of the same medicine will be of the same quality, and have the same action.
Check with your pharmacist if in doubt about the use of a medicine.
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Vanliga frågor
Can I expect the same results from a generic medicine as from a brand-name medicine?
Yes, in the UK, all generic and brand-name versions of the same medicine must meet strict quality controls to receive a product licence. This means they are of equivalent quality and will have the same action in your body, achieving the same therapeutic effect.
Why might my medication look different from what I usually get?
The colour, size, and shape of medicines can vary between different manufacturers, even for the same drug. If your doctor has prescribed the medicine generically, or if your pharmacist sources it from a different company, the appearance might change. However, as long as the generic name on the packaging is the same as before, the medicine itself will be identical.
How can I tell if a medicine is a combination product?
Combination products, which contain more than one medicine, are often sold under a brand name. However, the individual generic names of all the medicines included will always be listed in small print somewhere on the packaging.
Why do doctors prefer to prescribe medicines using their generic names?
Doctors are encouraged to use generic names because it reduces confusion since there can be many brand names for one medicine. Generic prescribing is also often cheaper for the NHS, and it allows pharmacists to dispense any suitable product, avoiding delays for specific brands.
Are there any medicines where it's important to stick to a specific brand?
Yes, for a small number of medicines, doctors will always prescribe a specific brand. This is because there can be significant differences in how much of the medicine ends up in your body (bioavailability) between different brands. Examples include certain epilepsy medicines like lamotrigine, as well as theophylline, diltiazem, nifedipine, isosorbide mononitrate, lithium, some beclometasone inhalers, and mesalazine.
Vidare läsning och referenser
- British National Formulary (BNF); NICE Evidence Services (UK access only)
- Gozzo L, Caraci F, Drago F; Bioequivalence, Drugs with Narrow Therapeutic Index and The Phenomenon of Biocreep: A Critical Analysis of the System for Generic Substitution. Healthcare (Basel). 2022 Jul 26;10(8):1392. doi: 10.3390/healthcare10081392.
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About the authorView full bio

Dr Hayley Willacy, FRCGP
General Practitioner, Medical Author
MBChB (1992), DRCOG, DFFP, MRCOG (Part 1) MRCGP (2007), DFSRH (2013), MSc - medical education (2020)
Dr Hayley Willacy was an NHS GP working in northwest England, who retired from clinical practice in 2022 after 30 years.
About the reviewerView full bio

Dr Krishna Vakharia, MRCGP
Chief Medical Officer for Health, Optum UK
MBChB, MRCGP(2013), BMedSci (hons), DFSRH, DRCOG, PGDipDerm (Distn)
Dr Krishna Vakharia is an NHS GP. She is also a regular examiner for the postgraduate Diploma in Practical Dermatology at Cardiff University as well as being the Chief Medical Officer for health at Optum UK.
Artikelhistorik
Informationen på denna sida är skriven och granskad av kvalificerade kliniker.
Next review due: 29 Jan 2028
30 Jan 2023 | Senaste versionen

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