Klabax - Dose | Use | Side Effects

This article was medically reviewed by M.Pharm, Marko Tanaskovic on August 12, 2018. To read more about an author, click here.

Klabax is medicine that is classified to the group of macrolide antibiotics. Klabax contains active substance known as clarithromycin. Klabax kills gram positive and gram negative microorganisms which is why it is used to treat infections.

Klabax is used for:

  • Respiratory tract infections (pneumonia, bronchitis, tonsillitis, pharyngitis, sinusitis).
  • Infections caused by the bacteria Helicobacter pylori
  • Skin and soft tissue infections caused by susceptible microorganisms


Klabax should be used with extra precautions in the following patients:

  • Patients taking high cholesterol drugs, called statins.
  • Patients taking migraine drugs.
  • Patients taking medicines that may cause heart rhythm disorders:
    • terfenadine,
    • astemizole,
    • pimozide,
    • cisapride. Concurrently use of these medications may cause a dangerous heart arrhythmia.
  • Patients with impairment of renal function
  • Patients with impairment of hepatic function
  • Patients with high blood pressure, heart failure, angina pectoris or heart attack.
  • Patients who have low levels of potassium in the blood (hypokalemia)

Klabax and alcohol should not be taken simultaneously.

Klabax information for pregnant woman and breastfeeding mothers

Klabax should not be used during pregnancy unless your doctor says so.

Use of Klabax is not recommended during breastfeeding because of possible side effects.

Klabax doses

Klabax can be taken with or without food, because food does not affect Klabax efficacy and safety.

Type of infection Recommended dosage regimen
Helicobacter pillory infection Take one Klabax 500 mg tablet every 8 hours for two weeks
Respiratory infections Take one Klabax 250 mg tablet every 12 hours for as long as your doctor recommended

It is not necessary to reduce the dose in elderly patients.

Klabax and its use with other drugs and food

Aside from above-listed medications, Klabax also should not be taken together with:

  • Seizure medications, such as:
    • carbamazepine,
    • phenobarbital,
    • valproic acid and others.
  • Medications for autoimmune disorders (Cyclosporin).
  • Sedatives, such as:
    • alprazolam,
    • lorazepam,
    • bromazepam and others.
  • Oral diabetes drugs, such as:
    • rosiglitazone,
    • pioglitazone, and others. Klabax has impact on blood sugar levels.
  • Insulin.
  • Blood thinners:
    • warfarin (Farin),
    • acenocoumarol (Sintrom, Sinkum 4),
    • nadroparin (Fraxiparin) and others.
  • Asthma medications (Theophylline).
  • Medicines used to treat heart and blood vessels problems, such as:
    • digoxin,
    • verapamil,
    • disopyramide and others.
  • Colchicine, a medicine used for gout treatment.
  • Antiretroviral drugs, such as:
    • ritonavir,
    • efavirenz,
    • saquinavir, and others.
  • Medications used to treat fungal infections, such as:
    • fluconazole,
    • ketoconazole,
    • itraconazole, and others.
  • Erectile dysfunction medications, such as:
    • sildenafil (Viagra),
    • tadalafil, and others.

Tell your doctor about all drugs (including vitamins and other OTC products) you are taking.

Side effects

  1. gastrointestinal side effects,
  2. liver damage (symptoms of liver damage include: jaundice, dark urine and loss of appetite),
  3. hearing loss,
  4. muscle and joint pain,
  5. dizziness,
  6. headache,
  7. increased sweating,
  8. Steven-Johnson syndrome,
  9. change in normal tooth color,
  10. change in the normal tongue color,
  11. heart disorders,
  12. chest pain,
  13. changes in the blood sugar levels and allergic reactions.

If you get any side effects, go to your doctor.

Information on this website are provided for educational purposes only and are not intended for medical advice, diagnosis or treatment.

If you have any concerns or questions about your health, you should always consult with a physician or other health-care professional.

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