Sounds like 'CEF-a-klor'

Easy-to-read medicine information about cefaclor – what it is, how to take cefaclor safely and possible side effects.

Type of medicine Also called
  • Antibiotic
  • Belongs to a group of antibiotics known as cephalosporins
  • Ranbaxy-Cefaclor®
  • Cefaclor Sandoz®

What is cefaclor?

  • Cefaclor is an antibiotic that is used to treat infections such as infections of the urinary tract, skin or chest.
  • It works by killing or stopping the growth of the bugs that cause the infection.
  • Cefaclor is one of a group of antibiotics known as cephalosporins.


  • The usual dose of cefaclor is 1 capsule (250 mg) three times a day.
  • Depending on the type of infection, your doctor will advise you on how long to take cefaclor for (usually 5 to 10 days).
  • Always take your cefaclor exactly as your doctor has told you. The pharmacy label on your medicine will tell you how much cefaclor to take, how often to take it, and any special instructions.

 How to take cefaclor

  • Take your cefaclor capsule with a glass of water.
  • Take cefaclor at the same times each day.
  • You can take cefaclor with or without food.
  • Keep taking cefaclor until you finish all the capsules, for as long as your doctor or pharmacist tells you to.
  • Do not stop taking cefaclor, even if you feel better after a few days, unless your doctor tells you to.
  • If you forget to take cefaclor, take it as soon as you remember.
  • But, if it is nearly time for your next capsule, just take the next capsule at the right time. Do not take double the amount of capsules.

Possible side effects

Like all medicines, cefaclor can cause unwanted side effects, although not everyone gets them. Often unwanted side effects improve as your body gets used to the new medicine.

Side effects What should I do?
  • Feeling sick, nausea or mild diarrhoea (runny stools)
  • Dizziness, headache
  • Stiff or tight muscles
  • Feeling restless or unable to sleep
  • Tell your doctor if troublesome.
  • Vaginal itching, soreness or discharge (thrush)
  • Tell your doctor or pharmacist.
  • Allergic reaction such as skin rash, itching, swelling of the lips, face, and mouth or difficulty breathing
  • Tell your doctor immediately or ring HealthLine.


Cefaclor may interact with a few important medications or herbal supplements, so check with your doctor or pharmacist.

Learn more

Medsafe Consumer Information Sheet   Cefaclor Sandoz

Credits: Sandra Ponen, Pharmacist.