When working with Cephalexin, a first‑generation oral cephalosporin antibiotic that fights many common bacterial infections. Also known as Keflex, it belongs to the broader cephalosporin family and is often prescribed for skin, ear, bone, and urinary‑tract infections. Because it targets the bacterial cell wall, it stops the bug from multiplying and clears the infection faster than the body could on its own. Most people get Cephalexin by prescription, and the typical course lasts 7‑14 days depending on the infection type.
A close relative is Penicillins, another major group of beta‑lactam antibiotics that share a similar mechanism of breaking down bacterial cell walls. While both penicillins and cephalosporins (including Cephalexin) fight gram‑positive bacteria, cephalosporins tend to have a broader spectrum against some gram‑negative germs. Knowing this overlap helps doctors choose the right drug when a patient is allergic to one class but not the other.
Another key player is Bacterial infections, the medical conditions caused by harmful bacteria such as Staphylococcus aureus, Streptococcus pyogenes, and E. coli. Cephalexin is effective against many of these, especially skin and soft‑tissue infections, uncomplicated urinary‑tract infections, and certain ear infections. The drug’s success hinges on matching the right dose to the specific infection, which is why dosage tables often list the infection site as a decision point.
Using Cephalexin also ties into the issue of antibiotic resistance. Overuse or incomplete courses can give bacteria a chance to adapt, making the drug less effective over time. That’s why health professionals stress finishing the full prescription, even if symptoms improve early. Resistance patterns can vary by region, so local guidelines may adjust the recommended dose or suggest an alternative drug.
Dosage is another practical piece of the puzzle. For adults with uncomplicated skin infections, the typical dose is 250‑500 mg every 6 hours, while urinary‑tract infections often need 500 mg every 12 hours. Children’s doses are calculated by weight, usually 25‑50 mg per kilogram per day divided into multiple doses. Adjustments are needed for people with kidney problems because Cephalexin is cleared through the kidneys.
Side effects are generally mild but worth noting. The most common complaints are stomach upset, diarrhea, and occasional rash. Rarely, people may experience severe allergic reactions like hives, swelling, or breathing trouble—signs that require immediate medical attention. If you notice any unusual symptoms, contact a healthcare provider right away.
Overall, Cephalexin offers a reliable option for many everyday bacterial infections when used correctly. Below you’ll find a curated collection of articles that dive deeper into comparisons with other drugs, dosing nuances, safety tips, and real‑world case studies. Explore the list to get the detailed insights you need for informed decisions about your health or your patients’ treatment plans.
A detailed comparison of Cephalexin (Phexin) with common antibiotic alternatives, covering uses, side effects, dosing, and how to choose the right drug.