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Cefalexin pour l'infection

Keflex

Before you take cefalexin, make sure your doctor knows if you have ever had an allergic reaction to an antibiotic.

Space out your doses evenly over the day and complete the full course.

L'effet secondaire le plus courant est la diarrhée, qui est généralement légère et disparaît rapidement. Si elle devient sévère ou dure plus de 24 heures, vous devez en parler à votre médecin.

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About cefalexin

Type de médicament

Antibiotique de type céphalosporine

Utilisé pour

Treatment (and sometimes prevention) of infection

Également appelé

Cephalexin, Keflex® (USA)

Disponible en

Capsules, tablets, and oral liquid medicine

Cefalexin is a broad-spectrum antibiotic, which means that it is active against a wide variety of germs (bacteria). It is used to treat bacterial infections such as urinary tract infections, skin infections, chest and throat infections, ear infections and dental infections. It is suitable for adults and children and can be taken during pregnancy. Some people who are allergic to penicillin antibiotics may not be able to take cefalexin, so make sure your doctor knows if you have ever had an allergic reaction to any other antibiotic.

Cefalexin treats an infection by killing the bacteria that are causing it.

Before taking cefalexin

Some medicines are not suitable for people with certain conditions, and sometimes a medicine may only be used if extra care is taken. For these reasons, before you (or your child, if appropriate) start taking cefalexin it is important that your doctor knows:

  • Si vous avez déjà eu une réaction allergique à un médicament. Il est particulièrement important que vous informiez votre médecin si vous avez eu une mauvaise réaction à une pénicilline ou à une céphalosporine.

  • Si vous avez des problèmes de fonctionnement des reins.

  • If you are pregnant, trying for a baby or breastfeeding. Although cefalexin is not known to be harmful to babies, it is still important that you tell your doctor if you are expecting or breastfeeding a baby.

  • Si vous prenez ou utilisez d'autres médicaments. Cela comprend tous les médicaments que vous prenez et qui sont disponibles sans ordonnance, ainsi que les médicaments à base de plantes et les médicaments complémentaires.

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How to take cefalexin

  • Before you start taking cefalexin, read the manufacturer's printed information leaflet from inside the pack. It will give you more information about the antibiotic and will provide you with a full list of side-effects which you could experience from taking it.

  • As a guide, it is usual to take 2-4 doses of cefalexin daily to treat an infection. Your doctor will tell you what dose is right for you (or your child) and the directions for taking it will be printed on the label of the pack to remind you about what the doctor said to you. If you have been given cefalexin liquid medicine to give to your child, please read the directions carefully to make sure that you give the correct amount. Your doctor will tell you how long your course of treatment will last - this is commonly about 5-7 days, although it could be for longer or shorter periods of time than this. It is important that you take cefalexin exactly as your doctor tells you to.

  • If you have been prescribed cefalexin to prevent a urinary tract infection from recurring, you are likely to be asked to take just one dose a day. Please take it in the evening. A course of treatment such as this can last for some time.

  • Cefalexin can be taken either before or after food, although it may start to work a little sooner if it is taken before food.

  • Space the doses evenly throughout the day. Keep taking this medicine until the course is finished unless you are told to stop. It is important to take the full course (even if you feel your infection has cleared up) in order to prevent the infection from coming back.

  • Si vous oubliez de prendre une dose, prenez-en une dès que vous vous en rendez compte. Essayez de prendre le nombre correct de doses chaque jour, mais ne prenez pas deux doses en même temps pour compenser une dose oubliée.

Tirer le meilleur parti de votre traitement

  • If you are having an operation or any other medical treatment, tell the person carrying out the treatment that you are taking an antibiotic. This is because cefalexin can interfere with the results of some medical tests.

  • Some people develop redness and itching in the mouth or vagina (thrush) after taking a course of antibiotics. If after taking cefalexin you think you could have thrush, please speak with your doctor or pharmacist for advice.

  • If you are taking the contraceptive 'pill' at the same time as an antibiotic, the effectiveness of the 'pill' can be reduced if you have a bout of being sick (vomiting) or diarrhoea which lasts for more than 24 hours. If this should happen, ask your doctor or pharmacist for advice about what additional contraceptive precautions to use. There is no need to use additional precautions for any bouts of sickness or diarrhoea which last for less than 24 hours.

  • Antibiotics like cefalexin can stop the oral typhoid vaccine from working properly. If you are due to have any vaccinations, please make sure the person treating you knows that you are taking this antibiotic.

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Can cefalexin cause problems?

Along with their useful effects, most medicines can cause unwanted side-effects although not everyone experiences them. The table below contains some of the ones associated with cefalexin. You will find a full list in the manufacturer's information leaflet supplied with the medicine. The unwanted effects often improve as your body adjusts to the new medicine, but speak with your doctor or pharmacist if any of the following continue or become troublesome.

Cefalexin side-effects

Que puis-je faire si je suis confronté à cette situation ?

Diarrhée

Drink plenty of water to replace the lost fluids. If the diarrhoea continues for longer than 24 hours, becomes severe, or contains blood, please let your doctor know straightaway

Indigestion, stomach ache, feeling sick (nausea)

Privilégiez les aliments simples. Si ce n'est pas déjà le cas, essayez de prendre vos doses après les repas

Thrush

Demandez conseil à votre médecin ou à votre pharmacien

Important: if you develop an itchy rash, swollen face or mouth, or have difficulty breathing, these can be signs that you are allergic to the antibiotic. Do not take any more doses, and speak with your doctor or go to your local accident and emergency department straightaway.

If you experience any other symptoms which you think may be due to the antibiotic, please speak with your doctor or pharmacist for further advice.

How to store cefalexin

  • Conservez tous les médicaments hors de la portée et de la vue des enfants.

  • Store tablets and capsules in a cool, dry place, away from direct heat and light.

  • If you have been given liquid medicine, store it in a refrigerator. It will have been made up freshly by the pharmacy and lasts for 14 days, so please remember to check the expiry date, and do not use it after this date.

Informations importantes sur tous les médicaments

Informations importantes sur tous les médicaments

Ne dépassez pas la dose prescrite. Si vous pensez que vous ou quelqu'un d'autre avez pris une dose excessive de ce médicament, rendez-vous au service des accidents et des urgences de votre hôpital local. Emportez la boîte avec vous, même si elle 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.

Si vous achetez des médicaments, vérifiez auprès d'un pharmacien qu'ils peuvent être pris en même temps que vos autres médicaments.

Si vous devez subir une opération ou un traitement dentaire, indiquez à la personne chargée du traitement les médicaments que vous prenez.

Ne gardez pas les médicaments périmés ou dont vous ne voulez plus. Apportez-les à votre pharmacie locale qui les éliminera pour vous.

Si vous avez des questions sur 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 sur le site web de la carte jaune.

Autres lectures et références

Historique de l'article

Les informations contenues dans cette page sont rédigées et évaluées par des cliniciens qualifiés.

  • Prochaine révision prévue : 26 Nov 2027
  • 26 Nov 2024 | Dernière version

    Dernière mise à jour par

    Michael Stewart, MRPharmS

    Examiné par des pairs

    Sid Dajani
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