Cefalexin (also known as Keflex or Keflin) is an antibiotic used to treat a wide range of bacterial infections. It works by killing the bacteria that cause the infection. Cefalexin is available as tablets, capsules, and liquid suspension form. It is a first-generation cephalosporin antibiotic, meaning it is effective against a broad range of bacteria. Cefalexin is mainly used to treat infections of the skin, respiratory tract, urinary tract, bones, and joints. It is also used to prevent and treat certain types of bacterial infections.
Cefalexin: A First-Generation Cephalosporin Antibiotic
Cefalexin, sold under brand names like Keflex and Apo-Cephalex, is a first-generation cephalosporin antibiotic. Here's a breakdown of its key aspects:
Mechanism of Action:
- Like other cephalosporins, Cefalexin works by interfering with bacterial cell wall synthesis. It binds to penicillin-binding proteins (PBPs) in the bacterial cell wall, preventing them from forming the cross-links necessary for strength and rigidity.
- This weakened cell wall ultimately leads to the death of the bacteria.
Effectiveness:
- Cefalexin is considered a broad-spectrum antibiotic, meaning it is effective against a wide range of Gram-positive and some Gram-negative bacteria. However, resistance to cephalosporins, including Cefalexin, is a growing concern. It is crucial to only use this antibiotic when truly necessary and as prescribed by a doctor to help combat antibiotic resistance.
Medical Uses:
- Cefalexin is typically used to treat mild to moderate bacterial infections in various parts of the body, including:
- Skin and soft tissue infections
- Bone infections (osteomyelitis)
- Urinary tract infections
- Ear infections (otitis media)
- Upper respiratory tract infections (e.g., sinusitis, tonsillitis)
- Dental infections
Administration:
- Cefalexin comes in various forms, including capsules, a suspension (liquid) for children, and a chewable tablet.
- The dosage and duration of treatment will depend on the severity of the infection, the type of bacteria causing it, and the patient's age and health condition.
- It is crucial to follow the doctor's instructions carefully and complete the entire course of treatment even if symptoms improve, to ensure complete eradication of the bacteria and prevent resistance development.
Important Safety Information:
- Cefalexin can cause side effects in some individuals, including:
- Diarrhea
- Nausea and vomiting
- Stomach pain
- Headache
- Rash
- Vaginal yeast infection (candidiasis)
- It is important to inform your doctor about any allergies you have, including to other antibiotics, and any medications you are taking, to avoid potential interactions.
- Pregnant or breastfeeding women should consult their doctor before taking Cefalexin, as it may pass into breast milk and potentially harm the baby.