Cephalexin treats bacterial infections by inhibiting bacterial cell wall synthesis. It belongs to the cephalosporin class of antibiotics and is effective primarily against gram-positive bacteria like Streptococcus and Staphylococcus species. Cephalexin binds to penicillin-binding proteins within the bacterial cell wall, preventing the final stages of peptidoglycan synthesis, which is crucial for cell wall strength and rigidity. This disruption leads to cell lysis and death. Because of its mechanism, cephalexin is effective in treating skin infections, respiratory tract infections, urinary tract infections, and bone infections. It is usually taken orally, well-absorbed, and generally safe with a good side effect profile.

Cephalexin is commonly prescribed by veterinarians for treating bacterial skin infections in dogs. It is particularly effective against common pathogens such as Staphylococcus bacteria, which are often responsible for skin infections like pyoderma. Cephalexin works by disrupting the formation of the bacterial cell wall, leading to bacterial death. Veterinarians often prescribe it in oral form, and it’s generally well-tolerated by dogs, with few side effects. Dosage and duration depend on the severity of the infection, and it’s essential to follow the vet’s instructions to ensure the infection is fully treated and to prevent antibiotic resistance.