Cephalexin is the generic form of the antibiotic Keflex. Cephalexin is usually prescribed for upper respiratory, urinary tract, ear and skin infections. Most people don't experience many side effects from this drug; however, there are some. It's important to take this medication exactly as prescribed for the full duration of treatment to prevent reinfection. If you experience particularly troublesome symptoms, your physician may change your antibiotic to one that produces fewer side effects for you. Everyone reacts differently to the same drug.
Nausea and Vomiting
Nausea and vomiting are common side effects of Cephalexin, usually mild and resolving after a day or two. Take your medication with a meal or a few crackers to help decrease these symptoms. You may also take the medication with a glass of milk, which helps coat the stomach. Additionally, if you avoid laying down for 30 minutes to an hour after taking this medication, you may avoid nausea and vomiting altogether.
Diarrhea
Diarrhea is the most common symptom of Cephalexin. This symptom is usually not experienced until you've been taking the medication for a day or two. This occurs because the antibiotic kills off the bad bacteria in your body and good bacteria in your intestinal tract. This causes an imbalance in the intestines, which leads to diarrhea. Your physician can prescribe medications to alleviate this symptom.
Mild Dizziness
Many people experience mild dizziness while taking Cephalexin. Avoid sitting up or standing up quickly; this helps the inner ears stabilize quicker and may help to alleviate this symptom. If you experience moderate or severe dizziness, call your physician. She may switch your antibiotic.
Serious Side Effects
Some people experience severe reactions to Cephalexin, though it's rare. If you're allergic to penicillin, you may be allergic to Cephalexin because it's a penicillin derivative. Inform your physician or pharmacist of this before using the drug. If you experience shortness of breath, rapid heartbeat, hives, swelling of the face or throat or extreme itching, go to the emergency room or call 911 immediately. These can be symptoms of a severe allergic reaction, which can lead to death.
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