Cephalosporins are a class of antibiotics used to treat a variety of bacterial infections. They work by disrupting the formation of the bacterial cell wall, leading to the death of the bacteria. Cephalosporins are often prescribed for infections such as pneumonia, skin infections, and urinary tract infections. These antibiotics are categorized into generations, with each generation having a broader spectrum of activity against different types of bacteria. The first generation, like Cephalexin, is effective against gram-positive bacteria, while later generations, such as Ceftriaxone, target a wider range of gram-negative bacteria.