Cephalexin is considered a strong antibiotic within its class, the cephalosporins. It is particularly effective against gram-positive bacteria, including common pathogens like Staphylococcus and Streptococcus species. Cephalexin is commonly prescribed for skin infections, respiratory tract infections, urinary tract infections, and bone infections.

While potent, it is generally well-tolerated, with a favorable safety profile and fewer side effects compared to some other antibiotics. However, its effectiveness can vary depending on the specific bacteria causing the infection and their resistance patterns. For serious or resistant infections, other antibiotics might be more appropriate, highlighting the importance of medical guidance in its use.