In treating bullous impetigo, which antibiotic is commonly prescribed?

Bullous impetigo is a skin infection typically caused by Staphylococcus aureus, which can lead to significant blistering. The treatment for bullous impetigo often involves systemic antibiotics, particularly when the infection is extensive or not responsive to topical treatment alone.

Cephalexin, a first-generation cephalosporin, is commonly prescribed because it is effective against the bacteria responsible for the infection, specifically MSSA (Methicillin-sensitive Staphylococcus aureus). It offers a broad spectrum of activity against most strains of Staphylococcus and Streptococcus, making it a suitable choice for managing bullous impetigo in a systemic manner.

While topical mupirocin is effective for localized infections and is often used for non-bullous impetigo, it may not be sufficient on its own for more severe cases. Clindamycin ophthalmic is specifically formulated for eye conditions, so it would not be appropriate in this situation. Vancomycin is reserved for more severe infections, particularly those caused by MRSA (Methicillin-resistant Staphylococcus aureus), and is generally not the first choice for bullous impetigo unless there's evidence of significant resistance or the need for broader coverage in complicated cases.

Thus,