Category- Allopathy
Medicine Highlights
| Uses | 1. To treat severe infections of the blood (septicemia) or bloodstream 2. To treat respiratory infections like pneumonia 3. To treat urinary tract infections (UTIs) 4. To treat skin and soft tissue infections 5. To treat bone and joint infections 6. To treat eye infections |
| Common Side Effects | 1. Mild pain or irritation at the injection site 2. Nausea or vomiting 3. Rash or itching |
| Additional Information | To be taken only when prescribed by the doctor. |
| Storage | 1. The medicine should be stored at room temperature. 2. Keep away from sunlight and moisture. 3. Keep away from the reach of children |
| How to Take This Medicine | This medicine is given through injection by a doctor or nurse. |
Gentamicin Uses
Gentamicin belongs to the Macrolide antibiotic class. It is used to treat serious bacterial infections such as:
- Severe infections of the blood (septicemia) or bloodstream
- Respiratory infections like pneumonia
- Urinary tract infections (UTIs)
- Skin and soft tissue infections
- Bone and joint infections
- Eye infections
Directions for use
- Take this medicine exactly as prescribed by your doctor, consistently at the same time each day.
- Do not stop taking this medicine without your doctor’s approval, even if you feel better.
- If you miss a dose, take it as soon as you remember, unless it’s close to your next dose; then skip the missed one.
Gentamicin side effects
More Common
- Nausea
- Vomiting
- Stomach pain or cramps
- Diarrhea
- Loss of appetite
Less common
- Headache
- Dizziness
- Skin rash or itching
How Gentamicin works
Gentamicin works by stopping bacteria from making proteins, which are essential for bacteria’ growth and survival. As a result, it stops the bacteria from growing and prevents the infection from spreading.
Safety Measures and Warning
Allergy/Hypersensitivity
If you are allergic to this medicine, taking it can cause serious reactions like rashes, swelling, or trouble breathing. Stop the medicine immediately and get medical help.
Myasthenia gravis
People with myasthenia gravis should use this medicine under doctor supervision, as it may worsen muscle weakness.
Hearing or balance problems
People with hearing or balance issues should use this medicine under doctor supervision, as it can damage the inner ear, causing hearing loss or dizziness.
Pregnancy
If you are pregnant, inform your doctor as Gentamicin should be used only if clearly needed; safety for the baby is not fully established.
Breastfeeding
If you are breastfeeding, inform your doctor, since Gentamicin may pass into breast milk and affect the baby.
Gentamicin Interaction with other Medicines
Avoid taking Gentamicin with the following medicines, as it may increase or decrease the desired effect, or in worse cases, it could be fatal:
Gentamicin Interaction with Food Products
Gentamicin does not have significant food interactions, as it is usually given by injection or intravenously. It is important to follow the doctor’s instructions and complete the full course.
Storage
- The medicine should be stored at room temperature.
- Keep away from sunlight and moisture.
- Keep away from the reach of children.
Gentamicin Chemical Structure
IUPAC (International Union of Pure and Applied Chemistry)/ Chemical name
Gentamicin: 2-[4,6-diamino-3-[3-amino-6-[1-(methylamino)ethyl]oxan-2-yl]oxy-2-hydroxycyclohexyl]oxy-5-methyl-4-(methylamino)oxane-3,5-diol
Intake routine/cycle
Daily Dose
Take Gentamicin exactly as your doctor recommends. The dose may change based on your condition and how well you respond. Do not take more than prescribed without consulting your doctor.
Missed Dose
If you forget to take your medicine, take the medication as soon as you remember. If it’s nearly time for your next dose, skip the missed one and continue with your regular schedule. Always consult the doctor before making any changes to your dosage.
Overdose
It is not recommended to take Gentamicin more than 5-7 mg/kg per day, as an overdose may cause serious side effects such as nausea, vomiting, headache, dizziness, rapid heartbeat, or confusion. Seek medical attention immediately if any severe reactions occur.
Gentamicin Summary
Gentamicin is an aminoglycoside antibiotic used to treat serious bacterial infections in blood, throat, urinary tract, skin and soft tissue, and bone or joint infections. It works by binding to the 30s ribosomal subunit of bacteria, blocking protein synthesis, which prevents bacteria from growing and kills them. People with kidney problems, hearing or balance issues, allergies to aminoglycosides, myasthenia gravis, or pregnant/breastfeeding women should use it only under a doctor’s supervision.
Common side effects include pain at the injection site, nausea, vomiting, rash, or itching, while serious reactions may include kidney damage, hearing loss, allergic reactions, or muscle weakness. Gentamicin is usually given by injection, so food does not affect its absorption.
FAQ’s
What are the side effects of gentamicin?
Common side effects include pain at the injection site, nausea, vomiting, rash, or itching. Serious side effects may include kidney problems, hearing loss or balance issues, allergic reactions, and muscle weakness.
What is the drug class of gentamicin?
Gentamicin belongs to the aminoglycoside antibiotic class.
What is gentamicin used for?
Gentamicin is used to treat serious bacterial infections in blood, respiratory, urinary tract, skin and soft tissue and bone and joint infections.
What is the mechanism of action of gentamicin?
Gentamicin works by stopping bacteria from making proteins, which are essential for bacteria’ growth and survival. As a result, it stops the bacteria from growing and prevents the infection from spreading.
Reference
- Chaves BJ, Tadi P. Gentamicin [Internet]. PubMed. Treasure Island (FL): StatPearls Publishing; 2023. Available from
- PubChem. Gentamicin [Internet]. Pubchem. PubChem; 2019. Available from
- Mayo Clinic. Gentamicin (Injection Route) Description and Brand Names – Mayo Clinic [Internet]. www.mayoclinic.org. 2025. Available from
Authors
Pranathi is a final year Pharm D student at Chalapathi Institute of Pharmaceutical Sciences. She loves learning and applying her knowledge in pharmacy and has a passion for writing, which allows her to express ideas clearly and creatively. She enjoys combining her technical skills with her love for writing and communication to make a meaningful impact. Currently she is working on a research paper about “Consanguineous marriages and its impact on children’s health” which will be published by the end of 2025.