Clarithromycin for infection
Xetinin XL
Granskad av Dr Colin Tidy, MRCGPSenast uppdaterad av Michael Stewart, MRPharmSLast updated 29 May 2023
Uppfyller patientens redaktionella riktlinjer
- Ladda nerLadda ner
- Dela
- Language
- Diskussion
- Ljudversion
- Add to preferred sources on Google
Clarithromycin is a macrolide antibiotic. It can be taken by people who are allergic to penicillin.
It is important to complete the prescribed course (unless you are told to stop). Otherwise your infection could come back.
The most common side effects of clarithromycin are diarrhoea, feeling sick (nausea), tummy (abdominal) discomfort, and unusual tastes.
At a glance
Clarithromycin is an antibiotic that treats bacterial infections and some stomach ulcers.
It is available as tablets, modified-release tablets, and an oral liquid.
Common side effects include feeling sick, stomach ache, and diarrhoea.
Take clarithromycin exactly as prescribed, usually twice a day.
Always finish the prescribed course, even if you feel better.
Avoid alcohol while taking clarithromycin.
I den här artikeln:
Video picks for Infektionsbehandlingsmedicin
Fortsätt läsa nedan
About clarithromycin
Typ av medicin | A macrolide antibiotic |
Används för | Bacterial infections including chest, skin, and ear infections Some types of stomach ulcers |
Även kallad | Xetinin XL® |
Tillgänglig som | Tablets, ,modified-release tablets and oral liquid medicine |
What is clarithromycin used for?
Tillbaka till innehållClarithromycin is a type of antibiotic used to treat bacterial infections such as respiratory infections, öroninfektioner and skin infections.
Clarithromycin is also given to get rid of Helicobacter pylori. This is the bacterium believed to cause stomach ulcers. If you are prescribed it for this reason, you will also be prescribed other medicines to take alongside it.
It works by stopping the bacteria causing the infection from multiplying.
Clarithromycin can be taken by adults and children.
Fortsätt läsa nedan
Side effects of clarithromycin
Tillbaka till innehållCommon side effects of clarithromycin are:
Illamående.
Being sick.
Stomach ache.
Farting (wind).
Indigestion.
Diarré.
Changes to taste and smell.
Sore mouth.
Headache.
You will find a full list in the manufacturer's information leaflet supplied with your 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.
How to manage clarithromycin side effects
Tillbaka till innehållCommon clarithromycin side effects (these affect fewer than 1 in 10 people) | Vad kan jag göra om jag upplever detta? |
Feeling sick or being sick, stomach ache, farting, indigestion | Stick to simple meals - avoid rich or spicy food |
Diarré | Drink plenty of water to replace lost fluids. If the diarrhoea continues or is severe, speak with your doctor as soon as possible |
Tooth or tongue discolouration, and changes in the way things taste or smell | This will disappear after you finish your treatment |
Sore mouth | Speak with your doctor if this becomes a problem |
Huvudvärk | Ask your pharmacist to recommend a suitable painkiller |
Om du upplever några andra symtom som du tror kan bero på denna medicin, tala med din läkare eller apotekare.
Fortsätt läsa nedan
Who should not take clarithromycin?
Tillbaka till innehållSome medicines are not suitable for people with certain conditions. Before starting clarithromycin it is important that your doctor or pharmacist knows:
Om du är gravid eller ammar.
If you have any problems with the way your liver works or the way your kidneys work.
If you know you have an unusual heart rhythm.
If you have a muscle disorder called myasthenia gravis.
If you are taking any other medicines. In particular, if you are taking a 'statin' medicine for high cholesterol or colchicine for gout as well as herbal and complementary medicines.
Om du någonsin har haft en allergisk reaktion mot en medicin.
How to take clarithromycin
Tillbaka till innehållRead the leaflet in the pack before starting clarithromycin. It explains how to take it and lists possible side effects.
Take exactly as your doctor tells you to and always check the label for the correct dose.
It is usually taken twice a day, in the morning and evening.
If you’re given a modified-release (XL) tablet, you only need to take one dose a day as it releases the medicine slowly throughout the day.
Standard tablets, liquid, and sachets can be taken before or after food. Modified-release (XL) tablets should be taken after food. Swallow whole, don’t chew or break them.
When clarithromycin is prescribed for a child, the dose will depend upon the child's weight. Make sure you read the label carefully so that you measure out the correct amount of medicine.
If you have been given clarithromycin sachets to take, open the sachet and mix the granules into a small glass of water before taking.
If you forget to take a dose, take one as soon as you remember. Do not take two doses at the same time to make up for a forgotten one.
Treatment usually lasts 5-14 days. Keep taking the antibiotic until you finish the course, even if you feel better, unless your doctor says otherwise. This helps stop the infection from coming back.
Få ut det mesta av din behandling
Tillbaka till innehållSome people develop thrush (oral or vaginal) after taking a course of antibiotics. If this happens to you, speak with your doctor or pharmacist for advice about how to treat it.
This antibiotic may stop the oral typhoid vaccine from working. If you are having any vaccinations, make sure the person treating you knows that you are taking this medicine.
If you are taking a 'statin' medicine for high cholesterol your doctor may advise you to stop taking the statin whilst being treated with clarithromycin. Ask your doctor or pharmacist if you are unsure.
Clarithromycin usually doesn’t affect the contraceptive pill, but diarrhoea, vomiting, or breakthrough bleeding may reduce its effectiveness. Ask your doctor or pharmacist for advice if this happens.
If you are having an operation or dental treatment, tell the person carrying out the treatment that you are taking clarithromycin.
If you buy any medicines, check with a pharmacist that they are suitable to take with this antibiotic.
If you still feel unwell after completing your course of the antibiotic, make another appointment to see your doctor.
How to store clarithromycin
Tillbaka till innehållFörvara alla läkemedel utom räckhåll och synhåll för barn.
Förvara på en sval, torr plats, borta från direkt värme och ljus.
If you have been given liquid medicine, it will have been made up by the pharmacy and it lasts for a limited number of days only. Check the expiry date on the bottle and do not use it after this date.
Viktig information om alla läkemedel
Tillbaka till innehållViktig information om alla läkemedel
Ta aldrig mer än den föreskrivna dosen. Om du misstänker att du eller någon annan kan ha tagit en överdos av denna medicin, gå till akutmottagningen på ditt lokala sjukhus. Ta med behållaren, även om den är tom.
Denna medicin är för dig. Ge den aldrig till andra människor även om deras tillstånd verkar vara detsamma som ditt.
Om du ska genomgå en operation eller någon tandbehandling, informera den som utför behandlingen om vilka mediciner du tar.
Behåll inte föråldrade eller oönskade mediciner. Ta dem till ditt lokala apotek som kommer att ta hand om dem åt dig.
Om du har några frågor om denna medicin, fråga din apotekare.
Rapportera biverkningar av ett läkemedel eller vaccin
Om du upplever biverkningar kan du rapportera dem online via Yellow Card website.
Vanliga frågor
Tillbaka till innehållHow long does it take for clarithromycin to work?
Clarithromycin usually starts to improve symptoms within 2-3 days. Full recovery can take 7-14 days, depending on the type and severity of the infection.
Is clarithromycin safe to take during pregnancy?
Clarithromycin is generally not recommended during pregnancy, especially in the first trimester. Your doctor may prescribe a safer alternative antibiotic if needed.
Can you drink alcohol with clarithromycin?
It’s best to avoid alcohol while taking clarithromycin, as it can increase the risk of side effects like nausea, stomach upset, or dizziness. Limiting alcohol helps the medication work more effectively and keeps you comfortable.
What should you avoid when taking clarithromycin?
You should avoid alcohol and certain medications that can interact with clarithromycin, including some statins and heart medicines. Always check with your doctor or pharmacist before taking new medicines or supplements.

Osäker på att blanda mediciner?
Kontrollera möjliga interaktioner mellan läkemedel, kosttillskott och livsmedel innan du tar dem tillsammans.
Vidare läsning och referenser
- Manufacturer's PIL, Clarithromycin 250 mg & 500 mg Tablets; Aurobindo Pharma - Milpharm Ltd, The electronic Medicines Compendium. Dated July 2021.
Fortsätt läsa nedan
About the authorView full bio

Michael Stewart, 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

Dr Colin Tidy, MRCGP
General Practitioner, Medical Author
MBBS, MRCGP, MRCP (Paediatrics), DCH
Dr Colin Tidy is an NHS Doctor, based in Oxfordshire.
Artikelhistorik
Informationen på denna sida är skriven och granskad av kvalificerade kliniker.
Next review due: 28 Nov 2027
29 May 2023 | Senaste versionen

Fråga, dela, anslut.
Bläddra i diskussioner, ställ frågor och dela erfarenheter inom hundratals hälsorelaterade ämnen.
Anmäl dig till Patientens nyhetsbrev
Din veckovisa dos av tydliga, pålitliga hälsoråd - skrivna för att hjälpa dig känna dig informerad, självsäker och i kontroll.
By subscribing you accept our Sekretesspolicy. Du kan avsluta prenumerationen när som helst. Vi säljer aldrig dina uppgifter.