Keflex is a brand name for the antibiotic cephalexin. It belongs to the class of first generation cephalosporins and is used to treat bacterial infections. The drug works by interfering with the synthesis of the bacterial cell wall. Its active ingredient inhibits the enzyme penicillin binding proteins which are essential for cross linking peptidoglycan strands. This action leads to weaker cell walls that eventually rupture and die under osmotic pressure. As a result the medication reduces infection symptoms such as fever swelling and pain while supporting the immune system in clearing the remaining bacteria.

Keflex is the brand name for the antibiotic cephalexin. It belongs to the class of first-generation cephalosporins and works by killing bacteria. The drug inhibits bacterial cell wall synthesis by interfering with peptidoglycan cross-linking. This action weakens the cell wall and leads to bacterial lysis and death. Clinically it is used to treat common infections such as skin and soft-tissue infections. After oral administration the drug is absorbed and distributed to tissues where it remains active. It is metabolized minimally and excreted mainly in the urine unchanged. The overall pharmacological profile makes it effective as a broad-spectrum oral antibiotic.

Common side effects of Keflex include rash and diarrhea. These reactions are generally mild and may resolve without intervention. Some patients may experience nausea or abdominal discomfort. Less frequently headache or dizziness can occur. Most individuals tolerate the medication well when taken as prescribed. Overall the frequency of serious adverse events remains low.

Keflex is a cephalosporin antibiotic that may cause skin rash in some patients. Gastrointestinal upset such as nausea or diarrhea can also occur. Headache is another reported side effect. Some individuals may experience mild fever or chills. Elevated liver enzyme levels have been observed in rare cases. The medication can occasionally lead to allergic reactions like hives. Dizziness or light-headedness may be felt by certain users. Overall these effects are generally infrequent and mild.