Cefalexin for infection
Keflex
مراجعة من قبل الدكتور كولين تايدي، MRCGPآخر تحديث بواسطة Michael Stewart, MRPharmSLast updated 26 Nov 2024
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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.
The most common side effect of cefalexin is diarrhoea, which is usually mild and soon passes.
If diarrhoea becomes severe or lasts for more than 24 hours, you should speak with your doctor.
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تابع القراءة أدناه
About cefalexin
نوع الدواء | A cephalosporin antibiotic |
يستخدم لـ | Treatment (and sometimes prevention) of infection |
يُعرف أيضًا باسم | Cephalexin, Keflex® (USA) |
متوفر كـ | Capsules, tablets, and oral liquid medicine |
What is cefalexin used for?
العودة إلى المحتوياتCefalexin is a type of antibiotic used to treat bacterial infections such as urinary tract infections, skin infections, chest و الحلق infections, التهابات الأذن و 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.
تابع القراءة أدناه
Side effects of cefalexin
العودة إلى المحتوياتCommon side effects of cefalexin are:
الإسهال.
الشعور بالغثيان.
عسر الهضم.
Stomach ache.
القلاع.
You will find a full list in the manufacturer's information leaflet supplied with the medicine.
غالبًا ما تتحسن الآثار غير المرغوب فيها مع تكيف جسمك مع الدواء الجديد، ولكن تحدث مع طبيبك أو الصيدلي إذا استمرت أي من الآثار التالية أو أصبحت مزعجة.
How to manage cefalexin side effects
العودة إلى المحتوياتCefalexin side effects | ماذا يمكنني أن أفعل إذا واجهت هذا؟ |
إسهال | 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 على الفور |
Indigestion, stomach ache, feeling sick | Stick to simple foods. If you are not already doing so, try taking your doses after meals |
القلاع | Speak with your doctor or pharmacist for advice |
مهم: 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.
تابع القراءة أدناه
Who should not take cefalexin?
العودة إلى المحتوياتSome medicines are not suitable for people with certain conditions. Before starting cefalexin it is important that your doctor knows:
If you have ever had an allergic reaction to a medicine. It is particularly important that you tell your doctor if you have had a bad reaction to a penicillin or cephalosporin antibiotic.
إذا كان لديك أي مشاكل في طريقة عمل الكلى لديك.
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.
إذا كنت تتناول أو تستخدم أي أدوية أخرى. يشمل ذلك أي أدوية تتناولها والتي يمكن شراؤها بدون وصفة طبية، بالإضافة إلى الأدوية العشبية والمكملات الغذائية.
How to take cefalexin
العودة إلى المحتوياتRead the leaflet inside the pack before starting cefalexin. It explains how the antibiotic works and lists possible side effects.
Take cefalexin 2-4 times a day, as directed by your doctor. Check the label for your exact dose and timing.
For children: if using liquid cefalexin, carefully measure each dose as instructed.
Treatment usually lasts 5-7 days, but your doctor may adjust this. Always follow their advice.
For UTI prevention: you may take one dose daily, usually in the evening.
You can take cefalexin before or after food, but it may work a bit faster before meals.
Space doses evenly through the day and complete the full course, even if you feel better.
If you miss a dose, take it as soon as you remember. Do not take twice to make up for a missed one.
تحقيق أقصى استفادة من علاجك
العودة إلى المحتوياتTell your doctor or healthcare provider if you’re taking cefalexin before any operation or medical test, as it can affect some test results.
Antibiotics can sometimes cause thrush (النظافة الفموية أو vaginal). If this happens, speak to your doctor or pharmacist.
If you take the contraceptive pill and have vomiting or diarrhoea for more than 24 hours while on antibiotics, the pill may be less effective. Ask your doctor or pharmacist about extra contraception. No extra precautions are needed if symptoms last less than 24 hours.
Cefalexin can stop the oral typhoid vaccine from working properly. Tell the person giving you any vaccines that you’re taking this antibiotic.
How to store cefalexin
العودة إلى المحتوياتاحفظ جميع الأدوية بعيدًا عن متناول ورؤية الأطفال.
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.
معلومات هامة عن جميع الأدوية
العودة إلى المحتوياتمعلومات هامة عن جميع الأدوية
لا تأخذ أكثر من الجرعة الموصوفة. إذا كنت تشك في أنك أو شخص آخر قد تناول جرعة زائدة من هذا الدواء، اذهب إلى قسم الحوادث والطوارئ في مستشفى منطقتك. خذ العبوة معك، حتى لو كانت فارغة.
هذا الدواء لك. لا تعطه لأشخاص آخرين حتى لو بدت حالتهم مشابهة لحالتك.
إذا اشتريت أي أدوية، تحقق مع الصيدلي من أنها آمنة لتناولها مع الأدوية الأخرى التي تتناولها.
إذا كنت ستخضع لعملية جراحية أو أي علاج للأسنان، أخبر الشخص الذي يقوم بالعلاج بالأدوية التي تتناولها.
لا تحتفظ بالأدوية منتهية الصلاحية أو غير المرغوب فيها. خذها إلى صيدليتك المحلية التي ستتولى التخلص منها نيابة عنك.
إذا كان لديك أي أسئلة حول هذا الدواء، اسأل الصيدلي الخاص بك.
الإبلاغ عن الآثار الجانبية لدواء أو لقاح
إذا واجهت آثارًا جانبية، يمكنك الإبلاغ عنها عبر الإنترنت من خلال Yellow Card website.
الأسئلة الشائعة
العودة إلى المحتوياتHow quickly does cefalexin work?
Cefalexin usually starts to work within an hour after taking the first dose. Most people notice improvement in symptoms, such as reduced pain, fever, or redness, within the first 1-2 days of treatment.
Is cefalexin safe to use during pregnancy?
Yes, cefalexin is considered safe to use during pregnancy as there is no evidence that it causes harm to the baby. However, always let your doctor or midwife know you are pregnant before taking cefalexin.
Does cefalexin contain penicillin?
No, cefalexin does not contain penicillin. However it is a cephalosporin antibiotic, which is chemically related to penicillin. People who are allergic to penicillin may also be allergic to cefalexin, so it is important to inform your doctor if you have a penicillin allergy before taking cefalexin.
Can you drink alcohol with cefalexin?
Yes, you can drink alcohol with cefalexin. However, it is advised to only drink in moderation as alcohol may increase side effects such as stomach upset, dizziness, or drowsiness.
Can cefalexin cause a rash?
Yes, cefalexin can cause a rash as a side effect and is usually a sign of an allergic reaction. If you develop a mild rash, contact your doctor for advice. If you have trouble breathing or swelling of the face, lips, tongue, or throat, seek medical help immediately.

غير متأكد من خلط الأدوية؟
تحقق من التفاعلات المحتملة بين الأدوية والمكملات الغذائية والأطعمة قبل تناولها معًا.
قراءة إضافية ومراجع
- Manufacturer's PIL, Cefalexin 250 mg and 500 mg Capsules; Aurobindo Pharma - Milpharm Ltd; The electronic Medicines Compendium. Dated August 2024.
- Manufacturer's PIL, Cefalexin 125 mg and 250 mg/5 ml Powder for Oral Suspension; Aurobindo Pharma - Milpharm Ltd; The electronic Medicines Compendium. Dated March 2024.
تابع القراءة أدناه
About the authorView full bio

مايكل ستيوارت، MRPharmS
Medicine Leaflet Review Manager – Contractor, Pharmacist
BPharm (Hons), MRPharmS
Michael is a community pharmacist practicing in the Midlands and South Yorkshire with more than 20 years’ experience advising on medicines and medical conditions. He has a strong background in healthcare training, having produced and delivered training courses for pharmacy teams and staff of residential care settings, including nurses. He has also contributed to pharmacy advisory boards for the management of low acuity conditions in the community.
About the reviewerView full bio

الدكتور كولين تايدي، MRCGP
General Practitioner, Medical Author
MBBS, MRCGP, MRCP (Paediatrics), DCH
Dr Colin Tidy is an NHS Doctor, based in Oxfordshire.
تاريخ المقال
تمت كتابة المعلومات على هذه الصفحة ومراجعتها من قبل أطباء مؤهلين.
Next review due: 26 Nov 2027
26 Nov 2024 | أحدث إصدار

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