Acyclovir Treatment for Eczema Herpeticum in Infants

Introduction to Treatment

• The Centers for Disease Control and Prevention (CDC) recommends oral acyclovir 20 mg/kg body weight per dose (maximum 400 mg/dose) three times daily for 5-10 days for infants with mild eczema herpeticum 1, 2

Treatment Approach

• For mild disease, the American Academy of Pediatrics and CDC suggest monitoring for clinical improvement within 48-72 hours and continuing therapy until lesions completely heal 1, 3
• In cases of moderate to severe disease, consider switching to intravenous acyclovir 5-10 mg/kg body weight per dose three times daily, and after lesions begin to regress, transition to oral acyclovir to complete treatment course 1

Special Considerations

• For neonates, higher doses of IV acyclovir (20 mg/kg IV every 8 hours) are typically used for HSV infections, as recommended by the CDC 2, 3
• The CDC advises monitoring renal function and watching for neutropenia, which can occur with prolonged acyclovir use, and ensuring adequate hydration during treatment 3

Evidence Quality and Treatment Rationale

• The recommended dosing comes from CDC guidelines which provide strong evidence (AI rating) for this treatment approach, indicating that early diagnosis and prompt treatment are critical to prevent complications and dissemination of infection 1, 2, 3, 4

Alternative Therapies

• For infants who fail to respond to acyclovir or have acyclovir-resistant HSV infection, the CDC suggests considering foscarnet 40 mg/kg body weight per dose IV three times daily as an alternative therapy 1