This medicine contains Ceftriaxone 500 mg and Sulbactam 250 mg and is used to treat certain bacterial infections. It contains ceftriaxone, a third-generation cephalosporin antibiotic, and sulbactam, a beta-lactamase inhibitor. Ceftriaxone works by preventing bacteria from forming their protective cell wall, which kills the bacteria and helps control the infection. Sulbactam helps protect ceftriaxone from enzymes produced by some bacteria that can make antibiotics ineffective, thereby improving its antibacterial activity. 

This medicine is given by a healthcare professional through injection into a vein or muscle. The dose and duration should be decided by a doctor based on the type and severity of infection, age, weight, and overall health.      

Common side effects may include pain or redness at the injection site, diarrhea, nausea, vomiting, rash, and changes in liver function tests. Rarely, serious allergic reactions, severe diarrhea associated with antibiotic use, blood abnormalities, or gallbladder-related problems may occur and require medical attention.   

Ceftriaxone 500 mg + Sulbactam 250 mg tablet is used to treat the following conditions:

1. Respiratory tract infections 
2. Urinary tract infections 
3. Skin and soft tissue infections 
4. Intra-abdominal infections 
5. Bone and joint infections 
6. Bloodstream infections 
7. Other bacterial infections as diagnosed by a doctor    

More Common

1. Injection-site pain or redness 
2. Diarrhea
3. Nausea 
4. Vomiting 
5. Skin rash 
6. Headache 
7. Changes in liver function tests     

Less Common 

1. Severe allergic reactions 
2. Severe or persistent diarrhea 
3. Clostridioides difficile-associated diarrhea 
4. Changes in blood cell counts 
5. Liver or gallbladder-related problems 
6. Severe skin reactions 
7. Seizures, particularly in patients with certain risk factors or excessive drug exposure     

This injection works by fighting bacteria that cause infections. Ceftriaxone stops bacteria from building their protective cell wall, which causes the bacteria to die. Sulbactam blocks beta-lactamase enzymes produced by certain bacteria that can break down some antibiotics. By protecting ceftriaxone from these enzymes, sulbactam helps ceftriaxone work effectively against susceptible bacteria.

Allergy or Hypersensitivity

Do not use this medicine if you had a serious allergic reaction to ceftriaxone, other cephalosporins, penicillins, or other beta-lactam antibiotics. Seek immediate medical attention if you develop difficulty breathing, swelling, or a severe rash.

Kidney or Liver Problems

Inform your doctor if you have kidney or liver disease. Your doctor may monitor your condition and adjust treatment when necessary.

Gallbladder Problems

Ceftriaxone can sometimes cause bile in the gallbladder to become thicker (known as “sludge”) or lead to other gallbladder problems, especially when used in high doses or for a long time. Inform your doctor if you experience severe stomach pain.

Pregnancy and Breastfeeding

Inform your doctor if you are pregnant, planning to become pregnant, or breastfeeding before receiving this medicine. Your doctor will decide whether it is appropriate for you.

As this medicine is given by injection, it is not affected by food in the same way as medicines taken by the mouth. You may generally follow your normal diet unless your doctor advises otherwise. Avoid alcohol if your doctor has advised you to do so during treatment.

Avoid taking Ceftriaxone 500 mg + Sulbactam 250 mg with the following medicines, as it may increase or decrease the desired effect, or in worse cases, it could be fatal:

IUPAC (International Union of Pure and Applied Chemistry)/ Chemical name

Ceftriaxone: (6R,7R)-7-[[(2Z)-2-(2-amino-1,3-thiazol-4-yl)-2-methoxyiminoacetyl]amino]-3-[(2-methyl-5,6-dioxo-1H-1,2,4-triazin-3-yl)sulfanylmethyl]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid 

Sulbactam: (2S,5R)-3,3-dimethyl-4,4,7-trioxo-4λ6-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid 

Daily dose

Take Ceftriaxone 500 mg + Sulbactam 250 mg 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 Ceftriaxone 500 mg + Sulbactam 250 mg, take the medication 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 Ceftriaxone 500 mg + Sulbactam 250 mg in doses higher than prescribed by your doctor, 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.

1. Store the medicine at room temperature. 
2. Keep away from sunlight and moisture. 
3. Keep out of reach of children 

1. This medicine should be administered exactly as prescribed by your doctor.  
2. The infusion is usually given over approximately 15 minutes.  
3. Since it is administered in a healthcare setting, missing a dose is uncommon.   

What are the uses of Ceftriaxone + Sulbactam injection? 

Ceftriaxone + Sulbactam injection is used to treat serious bacterial infections, including respiratory tract infections (like pneumonia), urinary tract infections, blood infections (septicemia), skin and soft tissue infections, bone and joint infections, abdominal infections, gynecological infections, and hospital-acquired infections. It is especially useful against bacteria that produce enzymes that can resist ceftriaxone alone.

What are the side effects of ceftriaxone sulbactam injection? 

Common side effects may include pain or redness at the injection site, diarrhea, nausea, vomiting, rash, and changes in liver function tests. Serious allergic reactions or severe and persistent diarrhea can occur rarely and require prompt medical attention

Can ceftriaxone sulbactam injection be used during pregnancy? 

Ceftriaxone + sulbactam injection should be used during pregnancy only when prescribed by a doctor. There is limited information on the safety of some ceftriaxone-sulbactam combinations during pregnancy, so the doctor will consider the potential benefits and risks before prescribing it.

Where can I buy ceftriaxone + sulbactam injections online in India? 

You can buy ceftriaxone + sulbactam injections online from SayaCare with a valid prescription. Since this is a prescription medicine, SayaCare verifies your prescription first and then dispenses the medicine as prescribed by your doctor. Once your order is processed, you can get the medicine delivered to your doorstep across India, making it convenient to access your prescribed medicines from home. 

Reference  

1. PubChem. Ceftriaxone [Internet]. pubchem.ncbi.nlm.nih.gov. Available from 
2. PubChem. Sulbactam [Internet]. Nih.gov. PubChem; 2025. Available from 
3. Nafdac.gov.ng. 2016 [cited 2026 Aug 12]. Available from 
4. Shelton K, Wiener-Kronish JP, Bagchi A. Acute Bacterial Pneumonia. Critical Care Secrets [Internet]. 2013 [cited 2026 Aug 12];131–41. Available from