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Kefnir 300mg Capsule

Written By Dr. Syeda Aafia, MBA, BDS
Reviewed By Dr. Mekhala Chandra, MD, MBBS
Last updated on 30 Jan 2026 | 03:40 PM (IST)
Kefnir 300mg Capsule is an antibiotic medicine used to treat a variety of bacterial infections. It is effective in infections of the respiratory tract (e.g., pneumonia), urinary tract, ear, nasal sinus, throat, and some sexually transmitted diseases.
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General Information

The content is shown in English
Kefnir 300mg Capsule image
Kefnir 300mg Capsule image

Product introduction

Kefnir 300mg Capsule may be taken with or without food. You should take it regularly at evenly spaced intervals as per the schedule prescribed by your doctor. Taking it at the same time every day will help you remember to take it. The dose will depend on what you are being treated for, but you should always complete a full course of this antibiotic as prescribed by your doctor. Do not stop taking it until you have finished the treatment, even when you feel better. If you stop taking it early, some bacteria may survive, and the infection may come back.


The most common side effects of this medicine include rash, allergic reaction, nausea, and diarrhea. These are usually mild, but let your doctor know if they bother you or last more than a few days.


Before using it, you should tell your doctor if you are allergic to any antibiotics or have any kidney or liver problems. You should also let your doctor know about all other medicines you are taking, as they may affect, or be affected by, this medicine. Pregnant and breastfeeding women should consult their doctor before using it. Avoid consuming alcohol while taking this medicine, as it may cause unpleasant side effects like nausea, vomiting, sweating, anxiety, and palpitations.

Uses of Kefnir Capsule

Benefits of Kefnir Capsule

Bacterial infections
Kefnir 300mg Capsule works by killing the infection-causing bacteria in your body. It is effective for bacterial infections of the lungs, throat, and urinary tract among others. This medicine usually makes you feel better within a few days, but you should continue taking it as prescribed even when you feel better. Stopping it early may make the infection come back and harder to treat.

Side effects of Kefnir Capsule

Most side effects do not require any medical attention and disappear as your body adjusts to the medicine. Consult your doctor if they persist or if you’re worried about them
Common side effects of Kefnir
  • Increased urine leukocytes
  • Nausea
  • Diarrhea
  • Headache
  • Vaginal moniliasis
  • Abdominal pain
  • Vaginal inflammation
  • Protein in urine
  • Increased gamma-glutamyltransferase
  • High lymphocyte count
  • Lymphocytopenia
  • Microhematuria

How to use Kefnir Capsule

Take this medicine in the dose and duration as advised by your doctor. Kefnir 300mg Capsule may be taken with or without food.

How Kefnir Capsule works

Kefnir 300mg Capsule is an antibiotic. It kills the bacteria by preventing them from forming the bacterial protective covering (cell wall) that is needed for them to survive.

Quick tips

  • Do not skip any doses, and finish the full course of treatment even if you feel better. Stopping it early may make the infection harder to treat.
  • Discontinue Kefnir 300mg Capsule and inform your doctor immediately if you get a rash, itchy skin, swelling of the face and mouth, or have difficulty breathing.
  • Diarrhea may occur as a side effect, but it should stop when your course is complete. Inform your doctor if it does not stop or if you find blood in your stools.
  • Take it with food to avoid an upset stomach.
  • Avoid consuming alcohol while taking Kefnir 300mg Capsule, as it may cause increased side effects.

Safety advice

Alcohol

Alcohol

CONSULT YOUR DOCTOR
It is not known whether it is safe to consume alcohol with Kefnir 300mg Capsule. Please consult your doctor.
Pregnancy

Pregnancy

SAFE IF PRESCRIBED
Kefnir 300mg Capsule is generally considered safe to use during pregnancy. Animal studies do not indicate harmful effects. However, there are limited human studies.
Breast feeding

Breast feeding

SAFE IF PRESCRIBED
Available human data suggest that the drug does not pass into breast milk in clinically significant amounts and is unlikely to harm the infant.
Avoid prolonged use of Kefnir 300mg Capsule, since it may have possible effects such as rash and diarrhea.
Driving

Driving

SAFE
Kefnir 300mg Capsule does not usually affect your ability to drive.
Kidney

Kidney

CAUTION
Kefnir 300mg Capsule should be used with caution in patients with severe kidney disease. Dose adjustment may be needed.
Liver

Liver

SAFE IF PRESCRIBED
Kefnir 300mg Capsule is probably safe to use in patients with liver disease. Limited data suggest dose adjustment may not be needed.

Interaction with drugs

Taking Kefnir with any of the following medicines can modify the effect of either of them and cause some undesirable side effects
Severe

Cholera Vaccine (Inactivated) (Oral Route)

Do not consume Cholera Vaccine (Inactivated) two weeks before and at least 10 days after consuming Cefdinir. Please consult your doctor. Cefdinir may reduce the efficacy of Cholera Vaccine (Inactivated).
Moderate

Amikacin (Injection Route)

Your doctor may monitor your kidney function regularly.
Moderate

Iron (Oral Route)

Ensure a gap of at least 2 hours between taking Cefdinir and Iron.
Moderate

Kanamycin (Injection Route)

Your doctor may monitor your kidney function regularly.
Moderate

Streptomycin (Injection Route)

Your doctor may monitor your kidney function regularly.

Frequently asked questions

Kefnir 300mg Capsule is effective if used in the dose and duration advised by your doctor. Do not stop taking it even if you see improvement in your condition. If you stop using Kefnir 300mg Capsule too early, the symptoms may return or worsen.
Yes, you may drink milk while taking Kefnir 300mg Capsule. In fact, you must not take Kefnir 300mg Capsule on an empty stomach and take it with food or milk to avoid stomach upset. If stomach upset occurs, please consult your doctor.
Yes, the use of Kefnir 300mg Capsule can cause diarrhea. Kefnir 300mg Capsule is an antibiotic that kills the harmful bacteria but can also affect the helpful bacteria in your stomach or intestine and cause diarrhea. If diarrhea persists, talk to your doctor about it.
If you forget a dose of Kefnir 300mg Capsule, take it as soon as you remember. However, if it is almost time for your next dose, skip the missed dose and take the next scheduled dose. Do not double the dose to make up for the missed one, as this may increase the chances of developing side effects.
You must avoid antacids containing aluminum or magnesium, iron supplements, or multivitamins while taking Kefnir 300mg Capsule. It is best to take these medicines at least 2 hours before or after taking Kefnir 300mg Capsule.
Usually, Kefnir 300mg Capsule starts working soon after you take it. However, it may take some days to kill all the harmful bacteria and relieve your symptoms completely.
Inform your doctor if you do not feel better even after finishing the full course of treatment. You must also inform your doctor if the symptoms get worse while using this medicine.
No, do not stop taking Kefnir 300mg Capsule before completing the full course of treatment. You may start feeling better before the infection is completely cured. Still, you need to take this medicine for the prescribed duration to gain maximum benefit from the medicine.

Fact Box

Chemical Class

Cephalosporins

Habit Forming

No

Therapeutic Class

ANTI INFECTIVES

Action Class

Third-Generation Cephalosporins
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Disclaimer

Tata 1mg's sole intention is to ensure that its consumers get information that is expert-reviewed, accurate and trustworthy. However, the information contained herein should NOT be used as a substitute for the advice of a qualified physician. The information provided here is for informational purposes only. This may not cover everything about particular health conditions, lab tests, medicines, all possible side effects, drug interactions, warnings, alerts, etc. Please consult your doctor and discuss all your queries related to any disease or medicine. We intend to support, not replace, the doctor-patient relationship.

Marketer details

Name: Glenmark Pharmaceuticals Ltd
Address: Glenmark Pharmaceuticals Limited, B/2, Mahalaxmi Chambers, 22, Bhulabhai Desai Road, Mumbai – 400 026.

Vendor Details

Country of origin: India
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