Like any medication, Keflex can cause side effects. The most common are mild stomach upset, diarrhea, and occasional nausea—usually easy to manage with food. More serious reactions, such as rash, swelling, or difficulty breathing, signal an allergic response and require immediate medical attention. Because it’s a beta‑lactam, people with a penicillin allergy should alert their doctor before starting therapy. Drug interactions are also possible; for example, taking Keflex with certain antacids can reduce absorption, so spacing doses by a couple of hours is advised. If you’re on blood thinners like warfarin, regular blood tests are needed, as antibiotics can sometimes affect clotting times. Practical tips to get the most out of your treatment: finish the full course even if symptoms improve, store tablets at room temperature away from moisture, and keep the medication out of reach of children. If you miss a dose, take it as soon as you remember unless it’s almost time for the next one—don’t double up. Tracking your dosage with a simple phone reminder can prevent accidental skips. With this background, you’re ready to decide how Keflex fits into your health plan. Below you’ll find articles that dig deeper into buying cheap generics online, comparing antibiotics, and managing side effects, giving you a complete toolbox to use the drug safely and effectively.