Cephalexin is a first-generation cephalosporin antibiotic used to treat a variety of bacterial infections. It works by killing bacteria through inhibiting their cell wall synthesis, which leads to bacterial cell death
. It is commonly prescribed for infections such as:
- Respiratory tract infections including pneumonia and bronchitis
- Skin and soft tissue infections
- Ear infections
- Bone infections
- Urinary tract infections
- Genital infections
Cephalexin is available in oral forms including capsules, tablets, and liquid suspension, and is typically taken every 6 to 12 hours for 7 to 14 days depending on the infection
. It is effective against many gram-positive bacteria and some gram-negative bacteria but is not effective against viral infections or certain resistant bacteria like MRSA
. Common side effects include stomach upset, diarrhea, and allergic reactions. It should be used with caution in people allergic to cephalosporins or penicillins, and those with kidney or liver disease should inform their doctor
. Cephalexin was first marketed in 1969 under the brand name Keflex and remains widely used today as a generic medication
. It is on the World Health Organization's List of Essential Medicines
. In summary, cephalexin is an oral antibiotic used to treat various bacterial infections by killing susceptible bacteria, and it should be taken exactly as prescribed to ensure effectiveness and reduce antibiotic resistance
