Erythromycin Dosage

Erythromycin is used to treat many different bacterial infections. The type and severity of the infection often dictate the dose of erythromycin that is prescribed, although other factors also play a role. When giving the oral form to adults, doses range from 250 to 800 mg every 6 to 12 hours. Dosing for children is primarily based on weight.

An Introduction to Dosing With Erythromycin

The dose of erythromycin your healthcare provider recommends will vary, depending on a number of factors, including:
 
  • The particular erythromycin product
  • The type and severity of your infection
  • How you respond to the medication
  • Other medications you are taking
  • Your weight
  • Other medical conditions you may have.
     
As is always the case, do not adjust your dosage unless your healthcare provider specifically tells you to do so.
 

Standard Erythromycin Dosages

For oral erythromycin ethylsuccinate, the usual dosage for adults ranges from 400 to 800 mg every 6 to 12 hours, depending on the particular infection.
 
For oral erythromycin (not erythromycin ethylsuccinate) products, the standard adult dosage ranges from 250 mg to 500 mg every 6 to 12 hours, depending on the particular infection and the product being used. The length of treatment will depend on the type and severity of the infection.
 
For the injectable form, your healthcare provider will calculate an appropriate dosage using your weight. This form is given either every six hours or continuously through an IV drip.
 
For acne treatment, erythromycin skin products are usually applied to the skin twice daily.
 
To treat an eye infection, apply 1 cm of ointment two to six times daily, depending on the severity of the infection. To prevent eye infections in newborns, only a single dose is given (and it works best if the ointment is applied into the lower eyelid pocket).
 
Erythromycin dosages for children are calculated based on the child's weight.
 
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