Description: Cefaclor kills the bacteria by stopping its cell wall synthesis. It has bactericidal activity against gram negative bacteria including E. coli, S. pneumoniae, N. gonorrhoea, P. mirabilis and H. influenzae.

This cephalosporin-type antibiotic treats a wide variety of bacterial infections (e.g., middle ear, skin, urine and respiratory tract infections) by stopping the growth of bacteria. This antibiotic only treats bacterial infections.

How to use cefaclor

Shake the bottle well before each dose. Take this medication by mouth usually every 8 or 12 hours, or as directed by your doctor. You may take this medicine with food if stomach upset occurs.

Antibiotics work best when the amount of medicine in your body is kept at a constant level. Therefore, take this drug at evenly spaced intervals.

Continue to take this medication until the full-prescribed amount is finished even if symptoms disappear after a few days. Stopping this medication too early may allow bacteria to continue to grow, which may result in a relapse of the infection.

Inform your doctor if your condition persists or worsens.

Notify your doctor or pharmacist promptly if any of these effects persist or worsen:

  • stomach upset
  • headache
  • nausea
  • vomiting
  • diarrhea

Tell your doctor immediately if any of these highly unlikely but very serious side effects occur:

  • stomach/abdominal pain
  • persistent nausea/vomiting
  • yellowing eyes or skin
  • dark urine
  • new signs of infection (e.g., persistent sore throat or fever)
  • easy bruising/bleeding
  • change in the amount of urine
  • mental/mood changes (such as confusion)

This medication may rarely cause a severe intestinal condition (Clostridium difficile-associated diarrhea) due to a resistant bacteria.

Use of this medication for prolonged or repeated periods may result in oral thrush or a new vaginal yeast infection (oral or vaginal fungal infection).

A serious allergic reaction to this drug is unlikely.

This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.


  • Allergic reaction to this medication.
  • Patients with medical history of severe kidney disease or intestinal disease (colitis).
  • Elderly people may be more sensitive to this drug.
  • This medication should be used only when clearly needed during pregnancy.
  • Consult your doctor before breast-feeding.

Consult your doctor regarding the precautions mentioned above.



Before using this medication, tell your doctor or pharmacist of all prescription and nonprescription/herbal products you may use, especially of: live bacterial vaccines, warfarin.

Although most antibiotics probably do not affect hormonal birth control such as pills, patch, or ring, some antibiotics may decrease their effectiveness.

This medication may cause false positive results with certain diabetic urine testing products (cupric sulfate-type). This drug may also affect the results of certain lab tests.

This document does not contain all possible interactions.


If overdose is suspected, contact a poison control center or emergency room immediately. Symptoms of overdose may include severe vomiting, seizures.

Notes: Do not share this medication with others.

This medication has been prescribed for your current condition only. Do not use it later for another infection unless told to do so by your doctor. A different medication may be necessary in those cases.

Missed Dose: If you miss a dose, use it as soon as you remember. If it is near the time of the next dose, skip the missed dose and resume your usual dosing schedule. Do not double the dose to catch up.

Storage: Follow the label instructions about whether or not to refrigerate. Do not freeze. Do not store in the bathroom. Discard any unused portion after 14 days. Keep all medicines away from children and pets.

Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company for more details about how to safely discard your product.



Available Brands

  • Aclor [ EuroHealth Care ]
  • Aczebri [ Shin Poong ]
  • Ceclobid [ EL Lab ]
  • Ceclor/Ceclor-DS [ Aspen ]
  • Cefmed [ Lloyd ]
  • Ephron [ Medhaus ]
  • Remedlor [ Remed ]
  • RiteMED Cefaclor [ RiteMED ]
  • Surecef [ Pharmacare ]
  • Verzat-ER [ Lloyd ]
  • Xelent [ Westmont ]

Also marketed as

  • Cefaczamil [ Geofman ]
  • Cefaloc [ Taiwan Biotech ]
  • CFC [ Wert Phils ]
  • Clorcef [ IAE ]
  • Clorgen [ Lloyd ]
  • Pharex Cefaclor [ Pascual ]
  • Solril-250/Solril-500 [ XL Lab ]
  • Vefarol [ Vamsler ]
  • Verzat/Verzat-ER [ Lloyd ]
  • Zeclor [ Medica Korea ]
  • Zyrcef [ Basic Pharma ]

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