• Cephalexin is in a group of drugs called cephalosporin antibiotics. Cephalexin is prescribed for bacterial infections of the respiratory tract, the middle ear, the bones, the skin, and the reproductive and urinary systems.

How should you take this medication?

• Take this medication by mouth usually every 6 or 12 hours, or as directed by your doctor. You may take this medicine with food if stomach upset occurs. If you are taking the liquid form of medicine, shake the bottle well before each dose.
   
• Take cephalexin with a full glass of water.
   
• Take this medication for the entire length of time prescribed by your doctor. Your symptoms may get better before the infection is completely treated. Cephalexin will not treat a viral infection such as the common cold or flu.
   
• if you miss a dose, take the missed dose as soon as you remember. If it is almost time for your next dose, skip the missed dose and take the medicine at your next regularly scheduled time. Do not take extra medicine to make up the missed dose.

General Precautions with Cephalexin

• Do not use this medication if you are allergic to either penicillin or cephalosporin antibiotics in any form, consult your doctor before taking cephalexin.
   
• Before using this medication, tell your doctor or pharmacist your medical history, especially of: kidney disease, intestinal disease.
   
• Studies have not been done in humans. However, most cephalosporins have not been reported to cause birth defects or other problems in animal studies.

What are the possible side effects of Cephalexin?

• Stomach upset, headache, fatigue, dizziness, or diarrhea may occur. If any of these effects persist or worsen, notify your doctor or pharmacist promptly.
   
• Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.