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Geenor 400 Tablet helps treat bacterial infections, especially urinary tract infections. It works by killing the microorganisms that cause the infection. It also restores the balance of good bacteria in the intestine. This balance may be disturbed by antibiotic use or infections.

Written By Dr. Subita Alagh, BDS,
Reviewed By Dr. Rajeev Sharma, MBA, MBBS,
Last updated on 12 May 2026 | 02:26 PM (IST)
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General Information

Contains

Norfloxacin (400mg)+ Lactobacillus (60Million spores)

Marketer

Grecian Pvt Ltd

Storage

Store below 30°C
The content is shown in English
Geenor 400 Tablet image
Geenor 400 Tablet image

Product introduction

Geenor 400 Tablet should be taken on an empty stomach. Take it at least 1 hour before or at least 2 hours after a meal. Take it regularly at evenly spaced intervals as prescribed by your doctor. The dose and duration of treatment may depend on the type and severity of the infection. Do not stop taking it until you complete the full course, even if you feel better. If you stop taking this medicine too early, the bacteria may continue to grow. Thus, the infection may return or worsen. The common side effects of this medicine are dizziness, nausea, headache, and abdominal cramps. These effects are usually mild and may go away as your body adjusts to the medicine. However, if you experience any symptoms that do not go away or get worse, let your doctor know. Before using it, tell your doctor if you are allergic to any antibiotics or have kidney or liver problems. You should also inform your doctor if you have experienced tendon problems (such as tendinitis or tendon rupture) related to norfloxacin or other quinolone antibiotics. Tell your doctor about all other medicines you are taking, as they may interact with this medicine. Pregnant and breastfeeding women should consult their doctor before using it.

Uses of Geenor Tablet

Benefits of Geenor Tablet

Treatment of Bacterial infections
Geenor 400 Tablet kills the bacteria that cause the infection. It helps maintain a healthy balance of bacteria in the body and may reduce antibiotic-related gut problems. This relieves symptoms such as a burning sensation during urination, frequent urination, and lower abdominal discomfort. Early treatment helps prevent the infection from worsening or spreading to other parts of the body.

Side effects of Geenor Tablet

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 Geenor
  • Abdominal cramp
  • Dizziness
  • Headache
  • Nausea

How to use Geenor Tablet

Take this medicine in the dose and duration as advised by your doctor. Swallow it as a whole. Do not chew, crush or break it. Geenor 400 Tablet is to be taken on an empty stomach.

How Geenor Tablet works

Geenor 400 Tablet is a combination of two medicines. Norfloxacin is an antibiotic. It works by stopping the action of a bacterial enzyme called DNA-gyrase. This prevents bacterial cells from dividing and repairing, thereby killing them. Lactobacillus is a probiotic. It works by restoring the balance of good bacteria in the intestine that may get upset after antibiotic use or due to intestinal infections. This is how it works to treat bacterial infections.

Quick tips

  • Geenor 400 Tablet must be taken on an empty stomach at the same time every day.
  • Avoid taking antacids, iron or calcium supplements, or multivitamins within 2 hours before or after this medicine to ensure proper absorption.
  • Do not take it with milk or any other dairy product. These products contain calcium, which can bind to one of the medicine’s ingredients and prevent it from working properly.
  • Drink plenty of fluids and maintain a healthy diet while taking this medicine.
  • Avoid consuming alcohol while taking this medication. Alcohol consumption may increase side effects.
  • Do not skip any doses, and complete the full course of treatment even if you feel better. Stopping it early may cause the infection to return and become harder to treat.
  • Inform your doctor if you are pregnant, planning to conceive, or breastfeeding.
  • In diabetic patients, it can cause unexpected hypoglycemia (low blood sugar). It is recommended to check your blood glucose levels more frequently while taking Geenor 400 Tablet.

Safety advice

Alcohol

Alcohol

CONSULT YOUR DOCTOR
It is not known whether it is safe to consume alcohol with Geenor 400 Tablet. Please consult your doctor.
Pregnancy

Pregnancy

CONSULT YOUR DOCTOR
The safety of Geenor 400 Tablet during pregnancy has not been established. There are no adequate and well-controlled studies in pregnant women, and animal data on reproductive toxicity are insufficient. Your doctor will weigh the benefits and any potential risks before prescribing.
Breast feeding

Breast feeding

CAUTION
Geenor 400 Tablet should be used with caution during breastfeeding. Breastfeeding should be held until the treatment of the mother is completed and the drug is eliminated from the body.
Driving

Driving

CONSULT YOUR DOCTOR
It is not known whether Geenor 400 Tablet alters the ability to drive. Do not drive if you experience any symptoms that affect your ability to concentrate and react. Please consult your doctor.
Kidney

Kidney

CAUTION
Geenor 400 Tablet should be used with caution in patients with kidney disease. Dose adjustment may be needed.
Liver

Liver

CONSULT YOUR DOCTOR
There is limited data available on the use of Geenor 400 Tablet in patients with liver disease.

Frequently asked questions

Geenor 400 Tablet is a combination of norfloxacin (an antibiotic) and lactobacillus (a probiotic). It helps treat bacterial infections of the urinary tract (cystitis, prostate infections). It may also be prescribed to treat skin and soft tissue infections, as well as sexually transmitted diseases.
Yes, Geenor 400 Tablet is used for the treatment of acute, uncomplicated, complicated, chronic, and recurrent urinary tract infections. It is recommended to take Geenor 400 Tablet only after consulting your doctor.
Norfloxacin is an antibiotic that kills harmful bacteria. However, it can also disturb the good bacteria in your gut. This can cause diarrhea and digestive upset. Lactobacillus is added to replenish beneficial bacteria, restore gut balance, and prevent antibiotic-associated diarrhea. When prescribed for traveler’s diarrhea, the addition of Lactobacillus helps maintain gut microbial balance.
Yes, Geenor 400 Tablet may help treat diarrhea and loose stools if caused by bacterial infections. Norfloxacin targets and kills susceptible bacteria. Lactobacillus helps replenish healthy gut bacteria, which may support recovery. If diarrhea persists or you notice symptoms such as a high fever or blood in your stools, consult your doctor.
Yes. Complete the full course of treatment even if symptoms improve. Stopping it early may allow some bacteria to survive. This leads to infection recurrence and contributes to antibiotic resistance (making it less effective in the future).
Geenor 400 Tablet is better absorbed when taken on an empty stomach. Take at least 1 hour before meals or 2 hours after. Food containing minerals such as calcium may reduce the amount of antibiotics absorbed into the body.
It is usually recommended not to take Geenor 400 Tablet with milk or other dairy products. Dairy products contain calcium, which can bind to norfloxacin and reduce its absorption. This makes it less effective. Take it at least 1 hour before consuming milk, curd, yogurt, or other dairy products, or at least 2 hours after.
Consult your doctor if symptoms do not improve, worsen, or return after completing the course. Possible reasons include antibiotic resistance, viral infection, or another underlying condition that may require a different treatment approach. Restarting or changing antibiotics without consulting a medical professional is not recommended.
Use caution when taking antacids or supplements containing iron, zinc, magnesium, or aluminum along with norfloxacin. These substances can interfere with the absorption of Geenor 400 Tablet and reduce its effectiveness. Do not take them within 2 hours before or after taking Geenor 400 Tablet. Check with your doctor before combining these products.
In rare cases, Geenor 400 Tablet has been associated with changes in blood sugar levels. Low blood sugar (hypoglycemia) has been observed after taking Geenor 400 Tablet, particularly in people with diabetes. If you have symptoms such as dizziness, sweating, confusion, or unusual weakness, monitor your blood glucose levels closely and consult your doctor.
Geenor 400 Tablet is generally not recommended during pregnancy unless clearly needed, as animal studies have shown potential harmful effects on the developing fetus. It is also not recommended for breastfeeding mothers. Due to limited safety data, its use during pregnancy or lactation requires careful medical assessment of potential risks and benefits. Geenor 400 Tablet is generally not recommended during pregnancy due to limited safety information. It should be used only if your doctor prescribes it. During breastfeeding, it is not known whether the medicine passes into breast milk. In both situations, always take this medicine only on medical advice to ensure it is safe for you and your baby.
Maintain adequate hydration (2–3 liters per day). Drinking sufficient fluids helps prevent dehydration and supports recovery. Proper hydration may also reduce the risk of certain side effects of the medication. Oral rehydration solutions may be helpful in cases of significant fluid loss.
Patients with a history of tendon problems should use Geenor 400 Tablet with caution. This medicine can occasionally affect tendons, most commonly the Achilles tendon. Inform your doctor about any previous tendon issues so they can weigh the benefits and risks and choose the safest option for you.

Fact Box

Habit Forming

No

Therapeutic Class

ANTI INFECTIVES

Related lab tests

Complete Blood Count

Peripheral Smear Examination

References

  1. Norfloxacin. Whitehouse Station, New Jersey: K Merck & Co.; 2008. [Accessed 23 Apr. 2019] (online) Available from:
  2. ScienceDirect. Norfloxacin. [Accessed 23 Apr. 2019] (online) Available from:
  3. ScienceDirect. Lactobacillius. [Accessed 23 Apr. 2019] (online) Available from:
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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: Grecian Pvt Ltd
Address: 2nd FLOOR, A-156/1, Block C, Mayapuri Industrial Area Phase I, II, New Delhi, Delhi 110064

Vendor Details

Country of origin: India
A licensed vendor partner from your nearest location will deliver Geenor 400 Tablet. Once the pharmacy accepts your order, the details of the pharmacy will be shared with you. Acceptance of your order is based on the validity of your doctor's ℞ and the availability of this medicine.

In case of any issues, contact us

Email ID: [email protected]
Phone Number: 0124-4166666
Address: 5th Floor Tower - B of the Presidency Building, 46/4 Mehrauli Gurgaon Road, Sector 14, Gurugram, Haryana-122001, India

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