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Cefaclor

Antibiotic

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What is cefaclor?

Cefaclor (also called Ceclor®) is used to prevent or treat infections. It is available in a 250-mg capsule and a strawberry flavored liquid suspension, both of which are taken by mouth.

How to take and store cefaclor

  • You may take cefaclor with or without food. If you experience stomach pain, take cefaclor with food.
  • Shake the liquid well before you take it. Use an oral syringe or medicine cup to be sure you are taking the correct amount.
  • Store the liquid medicine in the refrigerator.
  • Discard the liquid medicine after 14 days or when the expiration date on the label tells you to do so.
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Possible side effects

  • Nausea, vomiting
  • Diarrhea
  • Rash
  • Loss of appetite
  • Headache
  • Stomach pain
  • Heartburn
  • Allergic reaction with the following symptoms: rash, hives, itching, chills, fever, muscle aches, feeling irritable, and joint pain.

Symptoms of an allergic reaction include: rash, hives, itching, chills, fever, headache, muscle ache, shortness of breath, coughing, tightness in the throat, swelling of the face or neck.

Not all patients who take cefaclor will experience these side effects. Common side effects are bolded, but there may be others. Please report all suspected side effects to your doctor or pharmacist.

Find more information on side effects.

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Tips for patients and families

Be sure to discuss all questions and instructions with your doctor or pharmacist. 

  • Before taking cefaclor, tell your doctor if you have had an allergic reaction to any other cephalosporin or penicillin antibiotics. If you have allergy symptoms (listed above) or you have severe or watery diarrhea, tell your doctor right away.
  • Finish all doses of this medicine as instructed by your doctor, even if you think your condition is better. Do not stop taking this medicine unless your doctor tells you to do so.
  • Do not take cefaclor while you are taking probenecid without telling your doctor. Probenecid may increase the levels of cefaclor in your body.
  • Cefaclor may cause a false-positive urine test result when checking your urine for sugar (glucose) levels.
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Always check the medication label. Many medicines look the same. Do not take any new medicine, including over-the counter medicines or supplements, without checking with your doctor or pharmacist. Talk to your doctor or pharmacist about what to do in the case of a missed dose, allergic reaction, or medical emergency. 

This information is not intended to be a complete guide and is not a substitute for talking with your provider. Medicine names, appearance, formulas, or availability may vary by clinic location. Always follow the instructions given by your care team.

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