When working with Cephalexin, a broad‑spectrum oral antibiotic used to treat bacterial infections. Also known as Keflex, it is a go‑to option for many doctors because it hits a wide range of germs while staying easy on the stomach. In everyday language it’s just another antibiotic, but its chemistry puts it in the penicillin class, which matters for allergy checks and resistance patterns.
Cephalexin works by stopping bacteria from building cell walls, a process essential for their survival. This mechanism makes it especially effective against skin pathogens like Staphylococcus aureus and Streptococcus pyogenes. If you’ve ever dealt with a boil, impetigo, or a simple cut that got infected, chances are your doctor considered this drug. The same principle applies to urinary‑tract infections and certain respiratory bugs, so the drug’s reach is broader than the name might suggest.
First, dosage matters. For adults, a typical course runs 250 mg to 500 mg every 6 to 12 hours, depending on infection severity. Kids get weight‑based dosing, usually 25 mg per kilogram daily split into two or three doses. Finish the full prescription, even if you feel better early—stopping short can let resilient bacteria rebound, leading to resistance. Second, side effects are generally mild: stomach upset, occasional diarrhea, or a transient rash. Serious allergic reactions are rare but possible, especially if you’ve reacted to other penicillins.
Third, drug interactions deserve attention. Antacids containing aluminum or magnesium can lower absorption, so space them at least two hours apart. Blood thinners like warfarin may need closer monitoring because Cephalexin can tweak clotting numbers. Finally, storage is simple—keep the tablets in a cool, dry place, away from moisture and direct sunlight.
Beyond the basics, there are practical tips for real‑world use. If you’re taking multiple courses of antibiotics, ask your pharmacist whether a probiotic could help keep gut flora balanced. When traveling, carry a short‑term supply in case you can’t refill quickly, but always keep your prescription handy to avoid trouble at borders. And if you’re pregnant or nursing, the drug is generally considered safe, yet it’s wise to double‑check with your OB‑GYN.
The collection of articles below reflects this full picture. You’ll find guides on buying generic versions safely, detailed comparisons with other antibiotics, dosage calculators, and advice for specific conditions like cellulitis or uncomplicated UTIs. Whether you’re a patient, caregiver, or just curious about how this medication fits into a broader treatment plan, the resources ahead break down each angle we’ve introduced here.
