What is the primary indication for the use of Cephalexin?

Cephalexin is a first-generation cephalosporin antibiotic primarily indicated for the treatment of specific bacterial infections, particularly urinary tract infections and skin infections. It works by inhibiting bacterial cell wall synthesis, which is effective against many Gram-positive bacteria and some Gram-negative bacteria.

In urinary tract infections, Cephalexin provides a useful option for treating infections caused by susceptible organisms. Additionally, it is often prescribed for skin infections caused by staphylococci and streptococci. The effectiveness of Cephalexin in these areas stems from its pharmacological properties and its ability to penetrate well into tissues, making it an appropriate choice for localized infections.

While it may have some utility in treating respiratory infections, Cephalexin is not the primary choice compared to other antibiotics that are more effective for respiratory pathogens. Gastrointestinal infections typically require specific antibiotics suited to the organisms causing them and do not generally respond to Cephalexin. Lastly, since Cephalexin is an antibiotic, it is ineffective against viral infections. Understanding these contexts highlights why urinary tract infections and skin infections are the primary indications for its use.