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Gentapen 40mg Injection

Gentamicin (40mg)
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Gentapen 40mg Injection is an antibiotic used to prevent or treat a wide variety of bacterial infections. This may include infections of the urinary tract, bones and joints, lungs (e.g., pneumonia), brain (e.g., meningitis), sepsis, and some others. However, it is not effective for gonorrhea.

Written By Dr. Lipika Khurana, PGDHHM, BDS,
Reviewed By Dr. Mekhala Chandra, MD, MBBS,
Last updated on 29 Apr 2026 | 01:01 PM (IST)
₹4.4
₹4.81
9% off
2 ml Injection
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Gurgaon
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General Information

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Gentapen 40mg Injection image
Gentapen 40mg Injection image

Product introduction

Gentapen 40mg Injection is also widely used in hospitalized patients to prevent infections. It works by stopping the growth of bacteria. It is given as a drip (intravenous infusion) or as an injection directly into a vein or a muscle under the supervision of a healthcare professional. Your doctor may shift you to another antibiotic after culture reports become available. It should be used regularly at evenly spaced time intervals as prescribed by your doctor. Do not skip any doses and finish the full course of treatment even if you feel better. Stopping the medicine too early may lead to the infection returning or worsening.

This medicine may lead to kidney damage and hearing loss as side effects in some patients. Therefore, it is important to follow all the instructions given by your doctor while using this medicine. It may also cause balance disorder (loss of balance) and injection site pain in some people. 

Your doctor may monitor you with regular kidney function tests or hearing tests during treatment. Some patients may also be advised to get blood levels of this medicine measured. Before using this medicine, inform your doctor if you are pregnant, planning to become, or breastfeeding.

Uses of Gentapen Injection

Benefits of Gentapen Injection

Bacterial infections
Bacterial infections occur when harmful bacteria enter the body and multiply, leading to symptoms such as fever, pain, swelling, and in severe cases, damage to organs or tissues. If not treated properly, these infections can spread and become life-threatening. Gentapen 40mg Injection helps fight a wide range of serious bacterial infections by stopping the growth of bacteria. This leads to faster recovery, reduces the risk of complications, and helps restore health, allowing individuals to regain strength and return to their normal activities more quickly.

Side effects of Gentapen Injection

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 Gentapen
  • Hearing loss
  • Kidney damage
  • Balance disorder (loss of balance)
  • Injection site pain

How to use Gentapen Injection

Your doctor or nurse will give you this medicine. Kindly do not self administer.

How Gentapen Injection works

Gentapen 40mg Injection is an antibiotic. It stops bacterial growth by preventing synthesis of essential proteins required by bacteria to carry out vital functions.

Quick tips

  • Make sure you are well-hydrated before receiving Gentapen 40mg Injection, as it helps protect your kidneys from potential harm.
  • Ask your doctor to monitor your kidney function and hearing regularly during Gentapen 40mg Injection treatment, especially if used for more than a few days.
  • Report any signs of ringing in the ears, balance issues, or reduced urine output immediately. These could be early warning signs of side effects.
  • If you are receiving multiple injections, ask to rotate injection sites to reduce local pain or muscle stiffness.
  • Avoid using over-the-counter painkillers like NSAIDs unless approved, as they can increase the risk of kidney damage when combined.

Safety advice

Alcohol

Alcohol

CONSULT YOUR DOCTOR
It is not known whether it is safe to consume alcohol with Gentapen 40mg Injection. Please consult your doctor.
Pregnancy

Pregnancy

CONSULT YOUR DOCTOR
Gentapen 40mg Injection is not recommended during pregnancy as there is positive evidence of fetal risk based on animal studies. However, it may still be prescribed by a doctor in situations where the benefits outweigh the risks.
Breast feeding

Breast feeding

CAUTION
Gentapen 40mg Injection 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 Gentapen 40mg Injection 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
Gentapen 40mg Injection should be used with caution in patients with severe kidney disease. Dose adjustment may be needed.
Liver

Liver

SAFE IF PRESCRIBED
Gentapen 40mg Injection is safe to use in patients with liver disease. No dose adjustment is recommended.

Interaction with drugs

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

Tenofovir disoproxil fumarate (Oral Route)

Do not consume Tenofovir disoproxil fumarate with Gentamicin. If concurrent use is essential, your doctor may monitor your kidney function closely.
Severe

Vancomycin (Injection Route)

If concurrent use is essential, your doctor may closely monitor your kidney's functioning and overall treatment.
Severe

Carboplatin (Injection Route)

Your doctor may monitor your electrolyte levels, kidney function, and hearing ability along with your overall treatment.
Severe

Tacrolimus (Oral Route)

If concurrent use is essential, your doctor may monitor your tacrolimus levels, potassium levels and kidney function closely. They may adjust the doses as per the observations.
Severe

Colistin Sulphate (Injection Route)

Do not consume Colistin Sulphate with Gentamicin. If concurrent use is essential, your doctor may monitor your treatment and adjust the doses as per the observations.

Frequently asked questions

Gentapen 40mg Injection is safe if used in the dose and duration advised by your doctor. Take it exactly as directed and do not skip any dose. Follow your doctor's instructions carefully and let your doctor know if any of the side effects bother you.
Gentapen 40mg Injection should be administered under the supervision of a trained healthcare professional or a doctor only and should not be self-administered. The dose will depend on the condition you are being treated for and will be decided by your doctor. Follow your doctor’s instructions carefully to get maximum benefit from Gentapen 40mg Injection.
Keep this medicine in the container or the pack it came in, tightly closed. Store it according to the instructions mentioned on the pack or label. Dispose of the unused medicine. Make sure it is not consumed by pets, children and other people.
Gentapen 40mg Injection 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 Gentapen 40mg Injection too early, the symptoms may return or worsen.
Inform your doctor if you don't feel better after finishing the full course of treatment. Also, consult your doctor if your symptoms are getting worse while using this medicine. The doctor may modify the dose or suggest an alternative medicine.
No, do not stop taking Gentapen 40mg Injection without consulting the doctor even if you are feeling better. You may experience improvement in your symptoms before the infection is completely cleared. Therefore, for better results, it is advised to continue your treatment for the prescribed duration.

Fact Box

Chemical Class

Aminoglycosides

Habit Forming

No

Therapeutic Class

OPHTHAL OTOLOGICALS

Action Class

Bacterial Protein Synthesis Inhibitors- Aminoglycosides

References

  1. MacDougall C, Chambers HF. Aminoglycosides. In: Brunton LL, Chabner BA, Knollmann BC, editors. Goodman & Gilman’s: The Pharmacological Basis of Therapeutics. 12th ed. New York, New York: McGraw-Hill Medical; 2011. pp. 1515-16.
  2. Chambers HF, Deck DH. Aminoglycosides & Spectinomycin. In: Katzung BG, Masters SB, Trevor AJ, editors. Basic and Clinical Pharmacology. 11th ed. New Delhi, India: Tata McGraw Hill Education Private Limited; 2009. pp. 811-12.
  3. Briggs GG, Freeman RK, editors. A Reference Guide to Fetal and Neonatal Risk: Drugs in Pregnancy and Lactation. 10th ed. Philadelphia, PA: Wolters Kluwer Health; 2015. pp. 620-22.
  4. Chaves RG, Lamounier JA. Breastfeeding and maternal medications. J Pediatr (Rio J). 2004;80(5 Suppl):S189-98. [Accessed 31 Mar. 2019] (online) Available from:
  5. Central Drugs Standard Control Organisation (CDSCO). [Accessed 31 Mar. 2019] (online) Available from:
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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: Morepen Laboratories Ltd
Address: 409, Antriksh Bhawan, 22 Kasturba Gandhi Marg, New Delhi - 110 001 / AG-82 Basement Ground Floor, Sanjay Gandhi Transport Nagar, North West Delhi-110042

Vendor Details

Country of origin: India
A licensed vendor partner from your nearest location will deliver Gentapen 40mg Injection. 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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