By Medically reviewed by Hello Doktor Medical Panel


What is Klacid® (clarithromycin) used for?

Klacid® is a macrolide antibiotic. It fights bacteria in your body.

Klacid® is used to treat many different types of bacterial infections affecting the skin and respiratory system. It is also used together with other medicines to treat stomach ulcers caused by Helicobacter pylori.

Klacid® may also be used for purposes not listed in this medication guide.

How should I take Klacid® (clarithromycin)?

Take Klacid® by mouth and exactly as directed. Do not take more or less of it or take it more often than directed on the package label or recommended by your doctor.

How do I store Klacid® (clarithromycin)?

Klacid® is best stored at room temperature away from direct light and moisture. To prevent drug damage, you should not store Klacid® in the bathroom or the freezer. There may be different brands of Klacid® that may have different storage needs. It is important to always check the product package for instructions on storage, or ask your pharmacist. For safety, you should keep all medicines away from children and pets.

You should not flush Klacid® down the toilet or pour them into a drain unless instructed to do so. It is important to properly discard this product when it is expired or no longer needed. Consult your pharmacist for more details about how to safely discard your product.

Precautions & warnings

What should I know before using Klacid® (clarithromycin)?

Before using this drug, tell your doctor if:

  • You are pregnant or breastfeeding. This is because, while you are expecting or feeding a baby, you should only take medicines on the recommendation of a doctor.
  • You are taking any other medicines. This includes any medicines you are taking which are available to buy without a prescription, such as herbal and complementary medicines.
  • You have allergy with any of active or inactive ingredients of Klacid® or other medications.
  • You have any other illnesses, disorders, or medical conditions.
  • You have a life-threatening heart rhythm disorder.
  • You have a history of Long QT syndrome.
  • You have ever had jaundice or liver problems caused by taking Klacid®.
  • You have liver or kidney disease and you are also taking colchicine.

Is it safe during pregnancy or breastfeeding?

There isn’t enough information about the safety of using Klacid® during pregnancy and breastfeeding. Please always consult with your doctor to weigh the potential benefits and risks before taking Klacid®.

Side effects

What side effects can occur from Klacid® (clarithromycin)?

Uncommon side effects are:

  • Chest pain, back pain
  • Sleep disturbance, tremor, flushing
  • Photophobia
  • Bleeding gums, taste disturbance

Common side effects include:

  • Headache, dizziness
  • Nausea, vomiting, diarrhea, constipation
  • Fever, infection, rhinitis, pharyngitis
  • Rash, itchy
  • Increased liver enzymes

Not everyone experiences these side effects. There may be some side effects not listed above. If you have any concerns about a side-effect, please consult your doctor or pharmacist.


What drugs may interact with Klacid® (clarithromycin)?

Klacid® may interact with other drugs that you are currently taking, which can change how your drug works or increase your risk for serious side effects. To avoid any potential drug interactions, you should keep a list of all the drugs you are using (including prescription drugs, nonprescription drugs and herbal products) and share it with your doctor and pharmacist. For your safety, do not start, stop, or change the dosage of any drugs without your doctor’s approval.

Does food or alcohol interact with Klacid® (clarithromycin)?

Klacid® may interact with food or alcohol by altering the way the drug works or increase the risk for serious side effects. Please discuss with your doctor or pharmacist any potential food or alcohol interactions before using this drug.

What health conditions may interact with Klacid® (clarithromycin)?

Klacid® may interact with your health condition. This interaction may worsen your health condition or alter the way the drug works. It is important to always let your doctor and pharmacist know all the health conditions you currently have.


The information provided is not a substitute for any medical advice. You should ALWAYS consult with your doctor or pharmacist before using Klacid® (clarithromycin).

What is the dose of Klacid® (clarithromycin) for an adult?

The recommended dose is 1 tablet 500mg once daily.

What is the dose of Klacid® (clarithromycin) for a child?

The dosage has not been established in pediatric patients. It may be unsafe for your child. It is always important to fully understand the safety of the drug before using. Please consult with your doctor or pharmacist for more information.

How is Klacid® (clarithromycin) available?

Klacid® is available in the following dosage forms and strengths:

  • Oral suspension 125 mg/5 Ml
  • Tablet 250mg, 500mg

What should I do in case of an emergency or overdose?

In case of an emergency or an overdose, call your local emergency services or go to your nearest emergency room.

What should I do if I miss a dose?

If you miss a dose of Klacid®, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and take your regular dose as scheduled. Do not take a double dose.

Hello Health Group does not provide medical advice, diagnosis or treatment.

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Review Date: August 3, 2017 | Last Modified: December 19, 2019

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