Keflex, while generally safe, can cause side effects. Common ones include diarrhea, nausea, and vomiting. These usually are mild and resolve without intervention. However, severe diarrhea could signal Clostridium difficile infection, so contact your doctor immediately if you experience persistent or bloody stools.
Allergic Reactions
Allergic reactions, ranging from mild skin rash to severe anaphylaxis, are possible. Anaphylaxis is a life-threatening emergency requiring immediate medical attention. Watch for swelling of the face, lips, or tongue; difficulty breathing; or hives. Stop taking Keflex and seek immediate medical help if you experience any of these.
Other Potential Side Effects
Less common but still important to note are: increased risk of yeast infections (especially in women), abdominal pain, and changes in blood counts. Your doctor might recommend blood tests to monitor these during treatment. If you experience unusual bruising or bleeding, inform your physician. Also, report any signs of liver problems like jaundice (yellowing of skin or eyes) or dark urine. Remember to inform your doctor about all other medications you are taking to prevent potential interactions.
Pregnancy and Breastfeeding
Discuss Keflex use with your doctor if you are pregnant, breastfeeding, or planning to become pregnant. The drug may pass into breast milk and its effects on a nursing infant are not fully understood. Your doctor will assess the risks and benefits in your specific situation. Always disclose your pregnancy status to any healthcare provider.
