Penicillin to prevent recurrent leg cellulitis

Area of Science:

• Infectious Diseases
• Dermatology
• Pharmacology

Background:

• Leg cellulitis is a common bacterial skin infection.
• Recurrent episodes pose a significant health burden.
• Prophylactic strategies are needed to prevent recurrence.

Purpose of the Study:

• To evaluate the efficacy of low-dose penicillin in preventing recurrent leg cellulitis.
• To compare penicillin prophylaxis with placebo in a randomized controlled trial.

Main Methods:

• A double-blind, randomized controlled trial was conducted with 274 patients experiencing recurrent leg cellulitis.
• Participants received either penicillin (250 mg twice daily) or placebo for 12 months.
• The primary outcome was the time to the first recurrence of cellulitis, with follow-up up to 3 years.

Main Results:

• During the 12-month prophylaxis, penicillin significantly reduced cellulitis recurrence (22% vs. 37% in placebo group; P=0.01).
• The number needed to treat with penicillin to prevent one recurrence was 5.
• No significant difference in recurrence rates was observed during the follow-up period after prophylaxis ended.

Conclusions:

• Penicillin prophylaxis is effective in preventing leg cellulitis recurrence during treatment.
• The protective benefit of penicillin diminishes after cessation of therapy.
• Further research may explore long-term management strategies for recurrent cellulitis.