What is Erythromycin?

  • Erythromycin is used to treat a wide variety of bacterial infections.
  • Erythromycin is a macrolide antibiotic. It works by stopping the growth of bacteria.


Uses of Erythromycin

  • Erythromycin is used to prevent heart infection in people having dental procedures.
  • Erythromycin can be used to treat bacteria responsible for causing infections of the skin and upper respiratory tract, including Streptococcus, Staphylococcus, Haemophilus genera.

How does Erythromycin work?

  • Erythromycin belongs to a group of medications known as macrolides. It works by inhibiting a part of bacterial ribosomes, which are parts of cells that make proteins.
  • By inhibiting the ribosomes, the medication interferes with the ability of bacteria to make proteins, which is necessary for the bacteria to grow and multiply.

How to take Erythromycin?

  • Erythromycin comes as a capsule, tablet, delayed-release (releases the medication in the intestine to prevent break-down of the medication by stomach acids) capsule to take by mouth.
  • This medication is bitter in taste. Swallow the medication whole. Do not chew or crush.
  • Take the tablets or capsules with water or milk.

Common Dosage

  • It is taken with or without food every 6 hours (four times a day), every 8 hours (three times a day), or every 12 hours (twice a day).
  • Take the medicine at regular intervals of time.
  • Continue taking the prescription till the time it is prescribed.

When to avoid Erythromycin?

  • This antibiotic treats or prevents only bacterial infections. It will not work for viral infections (such as common cold, flu).
  • Using any antibiotic when it is not needed can cause it to not work for future infections.
  • Other medications can affect the removal of erythromycin from your body examples include azole antifungals (such as itraconazole), certain calcium channel blockers (such as verapamil), certain anti-seizure medications (such as carbamazepine).
  • Although most antibiotics are unlikely to affect hormonal birth control such as pills, few antibiotics (such as rifampin, rifabutin) can decrease their effectiveness. This could result in pregnancy.
  • If you use cisapride, pimozide, ergotamine, or dihydroergotamine consult your doctor because of affects it may cause along with erythromycine.

Precautions when taking Erythromycin

  • This medication may interfere with certain laboratory tests (urine tests).Make sure laboratory personnel and all your doctors know you use this drug.
  • Avoid taking this medicine if you are allergic to it.

Side Effects

  • upset stomach
  • diarrhea
  • vomiting
  • stomach pain
  • loss of appetite
  • Effect on organs


  • Keep this medication in the container it came in, tightly closed and out of reach of children.
  • Store it at room temperature and away from excess heat and moisture.

Pro Tips

  • Take this medicine for the full prescribed length of time. Your symptoms may improve before the infection is completely cleared. Skipping doses may also increase your risk of further infection that is resistant to antibiotics. Erythromycin will not treat a viral infection such as the common cold or flu.


Is Erythromycin addictive?



Can I have Erythromycin with alcohol?



Any particular food item to be avoided?

Grapefruit juice may increase the amount of erythromycin your body absorbs.


Can I have Erythromycin when pregnant?



Can I have Erythromycin when feeding a baby?



Can I drive after taking Erythromycin?



What happens if I overdose on Erythromycin?

An overdose with this medication can cause serious problems, such as an irregular heart rhythm (arrhythmia) or hearing loss.


What happens if I eat expired Erythromycin?

Depends on the time duration but it is advised to not take expired medicine.


What happens if I miss a dose of Erythromycin?

Take the missed dose as soon as you remember it. However, if it is almost time for the next dose, skip the missed dose and continue your regular dosing schedule.

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