Diclofénac pour la douleur et l'inflammation
Dicloflex, Diclomax, Voltarol
Revu par Dr Colin Tidy, MRCGPDernière mise à jour par Michael Stewart, MRPharmSLast updated 1 mai 2024
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Diclofenac is a medicine called a non-steroidal anti-inflammatory drug. It is also known as 'an NSAID'.
Before you take diclofenac, let your doctor know if you have ever had a bad reaction to any other anti-inflammatory painkiller.
The most common side effects of diclofenac are stomach pain, indigestion, and feeling sick (nausea).
Diclofenac is not suitable for people with heart disease, circulation problems, or a history of heart attack or stroke.
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About diclofenac
Type de médicament | |
Utilisé pour | Pain and inflammation |
Aussi appelé | Voltarol®; Dicloflex®; Diclomax®; Diclo-SR®; Econac®; Motifene®; |
Disponible sous forme de | Tablets, gastro-resistant tablets, prolonged-release tablets and capsules, suppositories, mouthwash |
What is diclofenac used for?
Retour au sommaireDiclofenac is a type of analgésique anti-inflammatoire called non-steroidal anti-inflammatory drugs (NSAIDs), or just 'anti-inflammatories'.
It is used to treat painful conditions such as l'arthrite, les entorses et les foulures, goutte, migraine, dental pain, and pain after surgical operations. It eases pain and reduces inflammation.
Types of diclofenac
There are two forms of diclofenac - diclofenac sodium and diclofenac potassium. The main difference between the two is that diclofenac potassium is absorbed into the body more quickly than diclofenac sodium.
A quick action is useful where immediate pain relief is required, and a prolonged action is more useful in reducing inflammation.
Diclofenac is also formulated as skin gels and patches and as eye drops.
Some brands of diclofenac also contain a medicine called misoprostol. Misoprostol helps to protect the stomach against irritation which can be caused by taking diclofenac over a period of time.
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How does diclofenac work?
Retour au sommaireDiclofenac works by blocking the effect of chemicals in your body, called cyclo-oxygenase (COX) enzymes. These enzymes help to make other chemicals in the body, called prostaglandins.
Prostaglandins are produced at sites of injury or damage, and cause pain and inflammation. By blocking the effect of COX enzymes, fewer prostaglandins are produced, which means pain and inflammation are eased.
Effets secondaires de diclofénac
Retour au sommaireCommon side effects of diclofenac are:
Indigestion.
Heartburn (acid reflux).
Douleurs d'estomac.
Se sentir mal.
Diarrhée.
You will find a full list in the manufacturer's information leaflet supplied with your medicine.
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How to manage diclofenac side effects
Retour au sommaireLes effets indésirables s'améliorent souvent à mesure que votre corps s'adapte au nouveau médicament, mais parlez à votre médecin ou pharmacien si l'un des effets suivants persiste ou devient gênant.
Common diclofenac side effects | Que puis-je faire si je ressens cela ? |
Indigestion or heartburn (acid reflux), stomach pain | Try taking your dose after a meal if you are not already doing so. If the discomfort continues, speak with your doctor |
Sensation de malaise (nausée) | Optez pour des repas simples - évitez les aliments riches ou épicés |
Diarrhée | Buvez beaucoup d'eau pour remplacer les fluides perdus |
Important: if you experience any of the following less common but more serious symptoms, stop taking this medicine and contact your doctor for advice straightaway:
Si vous avez des difficultés respiratoires telles que des sifflements ou un essoufflement.
Si vous présentez des signes de réaction allergique tels qu'un gonflement autour de la bouche ou du visage, ou une éruption cutanée sévèrement prurigineuse.
Si vous avez des selles sanglantes ou noires, vomissez du sang, ou ressentez de fortes douleurs abdominales.
Important : Studies have shown that taking diclofenac at higher doses and for long periods of time can increase your risk of having a crise cardiaque ou AVC. Seek urgent medical attention if you experience any signs of this, including: chest pain, shortness of breath, weakness or slurred speech.
If you experience any other symptoms which you think may be due to diclofenac, speak with your doctor or pharmacist for further advice.
Who should not take diclofenac?
Retour au sommaireSome medicines aren’t suitable for everyone. Before taking diclofenac, it’s important your doctor knows:
Si vous avez de l'asthme ou tout autre trouble allergique.
If you have ever had a stomach or duodenal ulcer, or if you have an inflammatory bowel disorder such as Crohn's disease or la colite ulcéreuse.
Si vous avez une maladie cardiaque, ou un problème avec vos vaisseaux sanguins ou votre circulation.
Si vous êtes enceinte ou si vous allaitez.
If you have any risk factors for heart disease, including hypertension artérielle (hypertension), high cholesterol levels, diabetes or smoking.
Si vous avez des problèmes de coagulation sanguine.
If you have a connective tissue disorder, such as a condition called systemic lupus erythematosus (SLE).
If you have problems with the way your liver works, or problems with the way your kidneys work.
Si vous prenez d'autres médicaments. Cela inclut tous les médicaments que vous prenez et qui sont disponibles à l'achat sans ordonnance, ainsi que les médicaments à base de plantes et les médecines complémentaires.
If you have ever had an allergic reaction to any other NSAID (such as aspirine, naproxène, indométacine, and ibuprofène), ou à tout autre médicament.
How to take diclofenac
Retour au sommaireBefore taking diclofenac, read the leaflet inside the pack for important information and possible side effects.
Take diclofenac exactly as prescribed by your doctor or pharmacist. Follow the dose and timing on the label.
Taking diclofenac with food or milk can help reduce stomach upset.
Diclofenac comes in different forms. Follow the instructions for your specific type. Some tablets should be mixed with water, while others must be swallowed whole.
If you miss a dose, take it when you remember unless it’s nearly time for the next dose. Ne prenez pas deux doses à la fois.
If using diclofenac mouthwash, rinse or gargle 15 ml two to three times a day. Use it for up to 7 days after dental treatment or 6 weeks after radiotherapy.
Tirer le meilleur parti de votre traitement
Retour au sommaireYour doctor will prescribe the lowest effective dose for the shortest time to reduce side effects. If you need diclofenac long term, you may be given another medicine to help protect your stomach.
Keep any regular doctor appointments so your progress can be checked, especially with long-term use.
If you have asthma and develop wheezing or breathing problems, stop taking diclofenac and see your doctor straight away.
Check with a pharmacist before taking other medicines. Do not take diclofenac with other anti-inflammatory painkillers, including some cold and flu remedies.
If you’re having surgery or dental treatment, tell them you are taking diclofenac.
How to store diclofenac
Retour au sommaireGardez tous les médicaments hors de la portée et de la vue des enfants.
Conserver dans un endroit frais et sec, à l'abri de la chaleur et de la lumière directes.
Informations importantes sur tous les médicaments
Retour au sommaireInformations importantes sur tous les médicaments
Ne prenez jamais plus que la dose prescrite. Si vous soupçonnez que vous ou quelqu'un d'autre avez pris une surdose de ce médicament, rendez-vous au service des urgences de votre hôpital local. Emportez le contenant avec vous, même s'il est vide.
Ce médicament est pour vous. Ne le donnez jamais à d'autres personnes, même si leur état semble être le même que le vôtre.
Ne gardez pas de médicaments périmés ou indésirables. Apportez-les à votre pharmacie locale qui s'en débarrassera pour vous.
Si vous avez des questions concernant ce médicament, demandez à votre pharmacien.
Signaler les effets secondaires d'un médicament ou d'un vaccin
Si vous ressentez des effets secondaires, vous pouvez les signaler en ligne via le Yellow Card website.
Questions fréquemment posées
Retour au sommaireHow long does it take for diclofenac to work?
Diclofenac usually starts to work within 30 minutes to 1 hour of taking a dose. Pain and inflammation may continue to improve over the next few hours or days, depending on the condition being treated.
Can you drink alcohol while taking diclofenac?
You should avoid or limit alcohol while taking diclofenac. Alcohol can increase the risk of stomach irritation, ulcers, and bleeding, and make other side effects worse.
Is it safe to take diclofenac during pregnancy?
Diclofenac is not recommended during pregnancy, especially after 20 weeks, as it may harm the unborn baby. Only take it during pregnancy if a doctor specifically advises it.
Can you buy diclofenac over-the-counter?
Yes. In the UK, low-dose diclofenac tablets (12.5 mg) and diclofenac gel are available from pharmacies without a prescription. Higher doses however require a prescription from a doctor.
Is diclofenac stronger than ibuprofen?
Yes, diclofenac is often considered stronger than ibuprofen for reducing inflammation and pain, but it may also have a higher risk of side effects, especially with long-term use.

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Lectures complémentaires et références
- Manufacturer's PIL, Diclofenac sodium 25 mg and 50 mg gastro-resistant tablets; Dexcel Pharma Ltd, The electronic Medicines Compendium. Dated September 2022.
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Historique de l'article
Les informations sur cette page sont rédigées et examinées par des cliniciens qualifiés.
Next review due: 3 Mar 2027
1 mai 2024 | Dernière version

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