What is Cefaclor Er: Uses, Warnings & Interactions

Updated May 14, 2025  •  Published Dec 30, 2020

Cefaclor Er overview

BRAND NAMES:

  • Ceclor, Ceclor Pulvules

Generic Names:

  • Cefaclor Er

Uses:

  • Treats bacterial infections. Belongs to a class of drugs called cephalosporin antibiotics.

Therapeutic Classes:

  • Antibiotic

Forms:

  • Capsule, Liquid, Chewable Tablet, Long Acting Tablet

How it’s taken:

  • By mouth

What is Cefaclor Er used for?

Cefaclor ER is an antibiotic that is used to treat skin infections caused by bacteria including bladder infection, bronchitis, kidney infections. It works by stunting the growth of bacteria. Cefaclor ER is indicated for use by adults and children and is available as a tablet.

What form(s) does Cefaclor Er come in

  • Capsule

  • Liquid

  • Chewable Tablet

  • Long Acting Tablet

What are common Cefaclor Er doses?

  • Tablet Extended Release 12 Hour 500MG

Common Cefaclor Er prescriptions

  • Cefaclor ER
    500mg tablet extended release 12 hour

How to take Cefaclor Er

  • Your doctor will tell you how much medicine to use. Do not use more than directed.

  • Oral routeYou may take this medicine with or without food.

  • Shake the oral liquid well each time you use it.

  • Measure the oral liquid medicine with a marked measuring spoon, oral syringe, or medicine cup.

  • Swallow the extended-release tablet whole. Do not crush, break, or chew it.

  • Chew the chewable tablet thoroughly before you swallow it.

  • Take all of the medicine in your prescription to clear up your infection, even if you feel better after the first few doses.

  • Shake the oral liquid well each time you use it.

  • Chew the chewable tablet thoroughly before you swallow it.

  • Take all of the medicine in your prescription to clear up your infection, even if you feel better after the first few doses.

  • Measure the oral liquid medicine with a marked measuring spoon, oral syringe, or medicine cup.

  • Your doctor will tell you how much medicine to use. Do not use more than directed.

  • Oral routeYou may take this medicine with or without food.

  • Swallow the extended-release tablet whole. Do not crush, break, or chew it.

What to do if you miss a dose of Cefaclor Er

  • Take a dose as soon as you remember. If it is almost time for your next dose, wait until then and take a regular dose. Do not take extra medicine to make up for a missed dose.

  • You may keep the oral liquid in the refrigerator for 14 days. After that, throw away any unused liquid. Do not freeze.

  • Ask your pharmacist, doctor, or health caregiver about the best way to dispose of any outdated medicine or medicine no longer needed.

  • Keep all medicine out of the reach of children. Never share your medicine with anyone.

Cefaclor Er contraindications

  • You should not use this medicine if you have ever had an allergic reaction to cefaclor or to a cephalosporin medicine such as Keflex®, Velosef®, or Suprax®.

Cefaclor Er warnings

  • Make sure your doctor knows if you are pregnant or breast feeding, or if you have had an allergic reaction to a penicillin medicine. Tell your doctor if you have kidney disease, allergies, or a history of stomach or intestinal problems.

  • This medicine can cause diarrhea. Call your doctor if the diarrhea becomes severe, does not stop, or is bloody. Do not take any medicine to stop diarrhea until you have talked to your doctor. Diarrhea can occur 2 months or more after you stop taking this medicine.

  • Tell any doctor or dentist who treats you that you are using this medicine. This medicine may affect certain medical test results.

  • Raniclor„¢ contains phenylalanine (aspartame). This is only a concern if you have a disorder called phenylketonuria (PKU), which is a problem with amino acids. Talk to your doctor before using this medicine if you have PKU.

  • Severe vomiting or stomach pain.

  • Unusual bleeding, bruising, or weakness.

  • Yellowing of your skin or the whites of your eyes.

Cefaclor Er interactions

  • Make sure your doctor knows if you are using a blood thinner such as warfarin (Coumadin®).

  • This medicine can cause diarrhea. Call your doctor if the diarrhea becomes severe, does not stop, or is bloody. Do not take any medicine to stop diarrhea until you have talked to your doctor. Diarrhea can occur 2 months or more after you stop taking this medicine.

  • Tell any doctor or dentist who treats you that you are using this medicine. This medicine may affect certain medical test results.

  • Raniclor„¢ contains phenylalanine (aspartame). This is only a concern if you have a disorder called phenylketonuria (PKU), which is a problem with amino acids. Talk to your doctor before using this medicine if you have PKU.

Cefaclor Er side effects

Serious Side Effects

  • Unusual bleeding, bruising, or weakness.

  • Yellowing of your skin or the whites of your eyes.

  • Rash.

  • Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing

  • Blistering or peeling skin.

  • Diarrhea that may contain blood.

  • Severe vomiting or stomach pain.

Less Serious Side Effects

  • Mild diarrhea.

  • Nausea.

  • Vaginal itching or discharge.

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