Cephalexin, while generally safe, can cause side effects. Common reactions include diarrhea, nausea, and vomiting. These usually are mild and resolve without treatment. However, persistent or severe gastrointestinal upset warrants immediate medical attention.
Allergic Reactions
A serious, though rare, side effect is an allergic reaction. Symptoms include rash, hives, itching, swelling of the face, lips, or tongue, and difficulty breathing. Seek immediate medical help if you experience any of these. Prior antibiotic allergies should be disclosed to your doctor before starting Cephalexin.
Other Potential Side Effects
Less common side effects include headache, dizziness, and vaginal yeast infections. Prolonged use may also increase the risk of *Clostridium difficile* infection, causing severe diarrhea. If you notice unusual vaginal discharge or severe, persistent diarrhea, contact your physician.
Inform your doctor about all medications you are taking, including over-the-counter drugs and supplements, as interactions are possible. Pregnant or breastfeeding women should discuss Cephalexin use with their doctor before starting treatment. Kidney or liver problems may require dose adjustments. Finally, always follow your doctor’s instructions for dosage and duration of treatment.
