Keflex, while generally safe and effective, can cause side effects. Common ones include diarrhea, nausea, vomiting, and stomach upset. These usually are mild and resolve without treatment. However, severe diarrhea might indicate Clostridium difficile infection, requiring immediate medical attention. Report persistent or severe diarrhea to your doctor.
Allergic Reactions
Serious allergic reactions, although rare, are possible. Symptoms include hives, swelling of the face, lips, tongue, or throat, and difficulty breathing. Seek immediate medical help if you experience these symptoms. Prior allergies to penicillin or cephalosporin antibiotics increase the risk of allergic reactions. Inform your doctor about your allergy history before taking Keflex.
Other Considerations
Keflex can interact with certain medications, including anticoagulants (blood thinners). Always inform your physician and pharmacist about all medications you are taking, including over-the-counter drugs and supplements. Kidney problems can affect how your body processes Keflex. Your doctor may adjust your dosage if you have kidney disease. Finally, pregnant or breastfeeding women should discuss Keflex use with their doctor before starting treatment.
