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Generic Name

  • Cefaclor.

Brand Names

  • Ceclor, Ceclor CD, Ceclor Pulvules, Raniclor.

General Information

Cefaclor is in a class of medications called cephalosporin antibiotics. It works by stopping the growth of bacteria. Cefaclor comes as a capsule, an extended-release (long-acting) tablet, and a suspension (liquid) to take by mouth. Cefaclor passes into breast milk and may affect a nursing infant. Do not take this medication without first talking to your doctor if you are breast-feeding a baby. Cefaclor is used to treat certain infections caused by bacteria, such as pneumonia and infections of the ears, lungs, throat, urinary tract, and skin. This medicine should not be used if you are allergic to one or any of its ingredients. The dose of cefaclor depends on the infection being treated. Keep the medicine in a tightly closed container and out of the reach of children and pets. Cephalosporin antibiotics work best when the level of medicine in your bloodstream is kept at a constant level. It is best, therefore, to take the prescribed doses of cefaclor at evenly spaced intervals day and night. There are no known harmful effects when this medicine is used during pregnancy.

Cefaclor Dosage

  • The dose of cefaclor will be different for different patients.
  • The usual adult dosage is 250 mg every 8 hours. For more severe infections or those caused by less susceptible organisms, doses may be doubled.
  • The usual recommended daily dosage for children is 20 mg in divided doses every 8 hours.

Side Effects of Cefaclor

The following side effects of Cefaclor may includes:

  • Stomach upset.
  • Dizziness.
  • Abdominal pain.
  • Painful mouth.
  • Nausea, vomiting.
  • Headache.
  • Inflammation of the large intestine.
  • Throat sores.

Warning and precautions before taking Cefaclor

  • Tell your doctor if you are pregnant, plan to become pregnant, or are breast-feeding.
  • Do not take a double dose to make up for a missed one.
  • Tell your doctor if you have or have ever had allergies, kidney disease, colitis, or stomach problems.
  • Do not start or stop any medicine without doctor or pharmacist approval.
  • Do not take cefaclor if you have ever had an allergic reaction to another cephalosporin or to a penicillin unless your doctor is aware of the allergy and monitors your therapy.
  • If your doctor tells you to stop taking cefaclor, throw away any unused medication.


  • If overdose is suspected, contact your local poison control center or emergency room immediately.
  • Symptoms of a cefaclor overdose may include nausea, vomiting, diarrhea, abdominal cramps, seizures, and muscle spasms.
  • US residents can call the US national poison hotline at 1-800-222-1222.
  • Canadian residents should call their local poison control center directly.



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