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Have you been prescribed the drug Cefaclor? Let's be aware of it (Cefaclor Capsules)

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📅 Updated: Jul 14, 2026 • ⏱ 7 min read • Editorial policy
Have you been prescribed the drug Cefaclor? Let's be aware of it (Cefaclor Capsules)
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Has your doctor prescribed you a medicine called Cefaclor? It may be to treat a bacterial infection you have. The name of this medicine may sound a bit unfamiliar to you. But don't worry. This is a medicine that doctors often prescribe. So today, let's talk briefly about this medicine, the things to be aware of when using it, and the side effects.

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What kind of medicine is Cefaclor?

Simply put, Cefaclor is an antibiotic, that is, an antibiotic . It belongs to the class of drugs called cephalosporins . Its main function is to destroy certain types of bacteria that enter our bodies and cause disease.

The most important thing is that this medicine only works for bacterial infections. It does not cure viral diseases like the common cold, flu, and cough. It is like trying to open a door with the wrong key. Therefore, never take this medicine without a doctor's prescription.

Things you need to tell your doctor before taking medicine

Before giving you Cefaclor, your doctor will want to know about your health history. It is especially important to tell them if you have any of the conditions listed below.

Your situation Why should you inform?
Allergy to Cefaclor, other cephalosporins, penicillin , or any other medicine or food This is very important to prevent a serious allergic reaction.
Kidney disease Medicines are filtered out of the body through the kidneys. If the kidneys are weak, the doctor may have to adjust the dosage of the medicine.
Stomach or intestinal diseases, such as colitisThis medicine may affect the intestines, so it is important to inform the doctor if you already have such a condition.
Bleeding problems Some antibiotics can affect blood clotting, so it is safe to inform about this.
Being pregnant or trying to get pregnant It is imperative to seek medical advice before taking any medication during pregnancy.
Breastfeeding the baby A small amount of the medicine can pass to the baby through breast milk, so you should definitely tell your doctor about this.

How should I use this medicine?

The way to use this is very simple, but very important.

  • This medicine is to be taken orally.
  • Try to take your medicine at the same time every day , as prescribed by your doctor. This will help keep the concentration of the medicine in your body at the same level.
  • You can take it before or after meals. However, if you experience stomach discomfort or heartburn, it is best to take it with food.
  • The most important thing: Even if you feel better, you should finish the entire course of medication prescribed by your doctor. If you stop taking it halfway, the bacteria that cause the illness may not be completely killed and the illness may return. And the bacteria may become resistant to the medication.

What if you take too much medicine? (Overdose)

If you think you have accidentally taken too much of this medicine, do not delay. Go to the nearest hospital Emergency Department (ETU) immediately. Or call the National Poisons Information Centre at the Colombo National Hospital .

Remember, this medicine has been prescribed for you only. Do not give this medicine to anyone else, even if they think they have the same condition as you.

What do you do if you miss a dose of medicine?

If this happens, take the missed dose as soon as you remember. However, if it is almost time for your next dose, skip the missed dose and take your next dose at the scheduled time. Do not take a double dose for any reason.

Other things that may interact with this medicine

Some things you take may interact with Cefaclor, so when you see your doctor, tell them about everything you're taking.

  • Other antibiotics
  • Probenecid (a medicine for gout)
  • Any other medication (taken for other diseases)
  • Local medicines such as herbal teas, kashaya, and arishta
  • Vitamins or other supplements

This list is not complete. So it's safest to tell your doctor about everything you take. It's also important to tell them about your smoking and alcohol use.

Things to be careful about when taking medicine

  • If symptoms do not improve: If your symptoms do not improve even after a few days of starting the medication, tell your doctor.
  • For people with diabetes: If you are diabetic, your urine sugar test may give a false-positive result while taking this medication. Therefore, be sure to talk to your doctor before changing your diet or the dosage of your diabetes medication.
  • Severe skin reactions: This is very important. Although rare, severe skin reactions can occur when using this medicine. These can sometimes appear several weeks after starting the medicine.

If you develop a fever or a feverish feeling, a red or purple rash that later blisters or peels, or swelling of the face, lips, or a lump in the neck or armpits, call your doctor immediately.

What are the possible side effects?

As with any medicine, Cefaclor can cause side effects in some people. Some of them require immediate medical attention, while others are not serious.

If you experience these symptoms, inform your doctor immediately.
- Allergic reactions (skin rash , itching, swelling of the face/lips/tongue) - Difficulty breathing
- Dizziness - Fever or chills
- Redness, blistering, peeling skin (even inside the mouth) - Seizures
- Severe or watery diarrhea, stomach pain - Sore throat
- Joint swelling - Difficulty urinating or change in the amount of urine
- Unusual bleeding or bruising - Feeling unusually tired or weak
If these symptoms persist or are bothersome, tell your doctor.
- Bloating or chest pain - Headache
- Nausea, vomiting

This list does not include all side effects. If you notice anything unusual, talk to your doctor about it.

How to store the medicine?

  • Keep away from children and pets.
  • Store at room temperature (between 20-25 degrees Celsius).
  • Throw away expired medicine.

💡 Take-Home Message

  • Cefaclor is an antibiotic used to treat bacterial infections. It does not work for viral infections like colds and flu.
  • You should tell your doctor about any other illnesses you have, any other medications you are taking, and any allergies you have.
  • Even if you think you are well, take the entire dose of medicine prescribed by the doctor within the prescribed time.
  • If you develop severe skin blisters, a rash , fever, or mouth sores, tell your doctor immediately .
  • This medicine is for you only. Do not give it to anyone else, even if they have the same symptoms as you.
❓ FAQ

Frequently Asked Medical Questions (FAQ)

Evidence-based clinical answers to common patient questions

What do you do if you miss a dose of medicine?

If this happens, take the missed dose as soon as you remember. However, if it is almost time for your next dose, skip the missed dose and take your next dose at the scheduled time. Do not take a double dose for any reason.

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⚠️ Important: Medical articles and information on Nirogi Lanka are strictly for educational and awareness purposes and do not substitute professional medical advice, diagnosis, or treatment. Always consult a qualified physician for any medical concerns.