Home / Antibiotics / Clarithromycin
Home / Antibiotics / Clarithromycin


Clarithromycin is an antibiotic that belongs to the macrolide family. It is used for the treatment of pharyngitis

Clarithromycin 500mg

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Clarithromycin uses

Clarithromycin is one of the prescription drugs that are used to treat different types of bacterial infections. Clarithromycin brand name is Biaxin, Biaxin XL, while the Clarithromycin generic name is Clarithromycin. This medicine can also be used in the combination with anti-ulcer medications in order to medicate few types of stomach ulcers. It is also used for preventing certain bacterial infections. This medicine mainly works by hindering the growth of bacteria. 

Clarithromycin is also called a macrolide antibiotic. This antibiotic is capable of treating only bacterial infections and does not work for viral infections like common cold or flu. Therefore, using any antibiotic which is not needed can often cause it not to work for future infections. Clarithromycin for UTI is often given to treat STD- caused urinary problems. Doctor often prescribes Clarithromycin for sinus infection because it treats possible bacterial infection of sinus.  

Clarithromycin dosage

This medicine is taken by mouth with or without the food as prescribed by your doctor, mainly every 12 hours. If the problem of upset stomach occurs, then you can take this medicine with food or milk. The dosage, drug form as well as how long you need to take this drug mainly depends upon: 

  • Your age
  • The condition being treated 
  • How severe the condition is
  • How you react to the first dose
  • Other medical conditions you have 

If you want to have the best effect, try to take this medicine at evenly spaced times. Always remember that this medicine should not be used to treat any condition which is not first checked by the doctor. Even if someone has the same symptom as you have, don’t even try to share this medicine with another person. 

You can take the regular tablets or suspension with or without your food. 

Clarithromycin extended-release tablets should always be taken with food, while they need to be swallowed whole, don’t crush, chew or break them. Before you measure the dose, make sure that you shake the oral liquid well. Always measure the liquid medicine with dosing syringe or with the help of a special dose-measuring spoon which is provided with medicine itself. This medicine is mainly given for only 7 to 14 days, but you need to intake this medicine for the entire prescribed period of time even if you start getting relief early from the symptoms.  

Skipping the doses of this medicine can increase the risk of infection which is resistant to medication. It is always recommended to store the medicine in original container at room temperature right away from light, heat and moisture. Therefore, remember that the oral liquid should not be kept in refrigerator.  

Clarithromycin side effects 

Nausea, vomiting, headache, diarrhea, as well as changes in the taste, may take place. If you find of these effects to be worsen or persist, immediately tell your doctor or pharmacist. Immediately get the emergency medical help as soon as you find the signs of an allergic reaction to clarithromycin or any acute skin reaction.  

If you have ever suffered from heart problems, then this medicine may cause a heart attack or stroke years after you have consumed this medicine. So make sure that you immediately seek the medical attention when you find that the chest pain is spreading slowly to your jaw or shoulder slurred speech, sudden numbness and trouble in breathing or weakness in the one side of your body.  

The side effects of this medicine also include: 

Loss of appetite, dark urine, swelling in feet or ankles, clay-colored stools, jaundice, upper stomach pain and falling short of breath. 

Therefore, the doctor will adjust the doses of other medicines that you are consuming regularly, once you start the medication of Clarithromycin.   

Clarithromycin Precautions

Before taking this medicine, inform your doctor if you are allergic o this medicine or medicines similar to it like azithromycin, telithromycin, or erythromycin. Before the intake of this medicine tell your doctor about your medical history like if you have or had liver disease, heart disease, diabetes or also any type of muscle disease. 

There are some of the medicines which may cause dangerous or unwanted effects when consumed with clarithromycin. Make sure that you use effectual birth control in order to stop pregnancy while you are using this medicine because Clarithromycin can harm an unborn baby. Avoid having any immunizations or vaccinations during the time of this medication unless your doctor tells you to because clarithromycin cause live bacterial vaccines not to function properly.  

Consult your doctor if you breastfeed because this medicine passes into your milk. Therefore, Clarithromycin for kids should not be used for those who are younger than 6 months old.  

Clarithromycin interactions 

Remember that drug interaction can immediately change the medications' work or can even increase the risk of severe side effects. Make sure that when you visit the doctor you keep all the list of products you use including all prescription as well as nonprescription drugs as well as herbal products in order to share with your doctor.  

Many drugs like amiodarone, dofetilide, sotalol and many others can affect your heart rhythm beside Clarithromycin, while other medications can also affect removal of Clarithromycin from an individual’s body which may alter the work of this medicine. This medicine often results in slowing down the removal of other medications from an individual's body, affecting how they work.   

MOA (Mechanism of Action) 

This medicine works by preventing bacteria from multiplying by acting as a protein synthesis inhibitor. Clarithromycin belongs to the class of drugs known as antibiotics. This medication should not be used while treating viruses like common cold as it is only used for preventing bacterial infections.  

Clarithromycin warnings 

If you possess any liver problems symptom, make sure that you inform your doctor because Clarithromycin may cause a liver problem. This medication can cause heart rhythm problem QT prolongation and also difficult associated diarrhea, so whenever you suffer from diarrhea before or after the treatment of this drug, inform your doctor immediately.   

Therefore, Clarithromycin and alcohol can be taken during the treatment as it will not reduce the effectiveness but it is always better to avoid as it reduces your energy. 

We only ship medications which are approved by FDA, Also please consult your doctor to make a full decision on what medication to take.

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