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O2 Suspension is an antibiotic medicine that is given to children to effectively treat a wide range of bacterial infections that may occur in the teeth, lungs, gastrointestinal infections, urinary and genital tract.

Written By Dr. Sakshi Jain, MS, BDS,
Reviewed By Dr. Mekhala Chandra, MD, MBBS,
Last updated on 12 Mar 2026 | 12:41 PM (IST)
₹44.9 MRP ₹49.6910% off 
As per Ministry of Health and Family Welfare
Gurgaon
 
 
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General Information

Contains

Ofloxacin (50mg/5ml)+ Ornidazole (125mg/5ml)

Marketer

Medley Pharmaceuticals

Storage

Store below 30°C
The content is shown in English
O2 Suspension image
O2 Suspension image

Your child’s medicine at a glance

Give O2 Suspension to your child orally, preferably at a fixed time, either before or after meals. In case your child develops a stomach upset, prefer giving it with meals. This medicine is usually given two times a day, in the morning and evening. If your child vomits within 30 minutes of intake, repeat the same dose but do not double the dose if it is time for the next dose. You must stick to the dose, time, and way prescribed by the doctor as they depend upon the type and severity of the infection, your child’s age, and body weight.

In some cases, minor and temporary side effects may develop after the intake of O2 Suspension. These include nausea, vomiting, metallic taste, headache, loss of appetite, abdominal cramps, and mild skin rash. These side effects almost always resolve on their own as your child’s body adapts to the medicine. However, in case they persist or start bothering your child, it would be best to consult your child’s doctor without any delay.

Tell the doctor if your child has had any previous episode of allergy, heart-problem, liver impairment, and kidney malfunction. Knowledge of your child’s entire medical history is critical for dose alterations and for planning your child’s overall treatment.

Uses of O2 Suspension in children

  • Treatment of Bacterial & parasitic infections

Benefits of O2 Suspension for your child

Treatment of Bacterial & parasitic infections
O2 Suspension is a combination medicine which can be used to treat infections caused by bacteria and parasites. It works by killing and stopping the growth of the bacteria and parasites causing the infection. This medicine usually makes you feel better quite quickly. However, you should continue taking it as long as it is prescribed even if you feel better, to make sure that all bacteria and parasites are killed and do not become resistant.

Side effects of O2 Suspension in children

O2 Suspension does not pose serious side effects and is well-tolerated by children. In case the side effects do occur, they’re likely to subside once the body adapts to the medicine. Consult your child’s doctor if these side effects persist or bother your child. The most common side effects include-
Common side effects of O2
  • Weight loss
  • Vaginal inflammation
  • Diarrhea
  • Nausea
  • Dizziness
  • Headache
  • Insomnia (difficulty in sleeping)
  • Vomiting
  • Itching

How can I give O2 Suspension to my child?

Take this medicine in the dose and duration as advised by your doctor. Check the label for directions before use. Measure it with a measuring cup and take it by mouth. Shake well before use. O2 Suspension may be taken with or without food.

How O2 Suspension works

O2 Suspension is an antibiotic consisting of ofloxacin and ornidazole as its active ingredients. Both these ingredients tamper the bacteria’s DNA. Thus, it kills the infection-causing bacteria, stopping the infection and the bacteria from growing further without making them resistant to further treatment.

Quick tips

  • Diarrhea is a common side effect of O2 Suspension. Encourage your child to drink plenty of water in case it develops.
  • Your child may have an altered taste or furry tongue (coating of O2 Suspension on tongue) after taking the medicine. Eating citrus fruit or sipping plenty of water or fruit juice may help.
  • Do not give any calcium, magnesium, iron, vitamin, or antacid within 2 hours of taking O2 Suspension as these can affect the absorption of the medicine.
  • Conditions like common cold and flu are caused by viruses. Never use this medicine for such conditions.
  • Quit giving O2 Suspension and speak to the doctor immediately if your child develops a rash, itchy skin, swelling of face and mouth, or has difficulty in breathing.
  • Only give O2 Suspension to your child for their current infection. Never save medicine for future illnesses.

Safety advice

Kidney

Kidney

UNSAFE
O2 Suspension is unsafe to use in patients with kidney disease and should be avoided.
Liver

Liver

UNSAFE
O2 Suspension is unsafe to use in patients with liver disease and should be avoided.

Frequently asked questions

O2 Suspension can interfere with cough and cold medicines. One of the active ingredients of O2 Suspension can interact with alcohol-containing medicines like cough syrups and can cause adverse effects. Don’t give your child any medicines along with O2 Suspension without consulting the doctor.
Though an extra dose of O2 Suspension will not impact your child’s health, never give an overdose of any medicine. If you think you have given too much to your child, immediately speak to a doctor. Exceeding the recommended dose may cause unwanted side effects such as seizures, tremors, severe headache, sudden weakness, blood cell abnormalities, and rapid and irregular heart beat. Rush to your child’s doctor on an immediate basis if you notice any of these symptoms.
Not seeing any improvement could signify that the medicine is not able to act against the infection-causing bacteria. In such a case, visit your child’s doctor who may prescribe an antibiotic having a farther reach of impact than O2 Suspension. Since not all medicines are given by oral route, your doctor may suggest giving an intravenous injection to your child in the hospital.
O2 Suspension can sometimes interact with other medicines or substances. Tell your doctor about any other medicines your child is taking before starting O2 Suspension. Also, check with your child’s doctor before giving any medicine to your child.
Antibiotics usually do not interfere with the ingredients in vaccines or cause a bad reaction in a child who has just been vaccinated. However, children taking antibiotics should not get vaccinated until they recover from the illness. As soon as your child feels better, the vaccine can be given.
Inform the doctor if your child is suffering or has suffered from a heart disease, genetic disorders involving blood vessels, seizures, psychiatric disorders, diabetes, photoallergy (allergy from sunlight), neuromuscular disorders, or rheumatoid arthritis. This is because there is a possibility that O2 Suspension may aggravate these conditions and result in complications.

Fact Box

Habit Forming

No

Therapeutic Class

GASTRO INTESTINAL

References

  1. Ornidazole. Auckland, New Zealand: Teva Pharma (New Zealand) Limited; 2018. [Accessed 19 Jan. 2021] (online) Available from:
  2. Ofloxacin [FDA Label]. Raritan, NJ: Ortho-McNeil-Janssen Pharmaceuticals, Inc.; 2008. [Accessed 19 Jan. 2021] (online) Available from:
  3. Graham DB, Tripp J. Ofloxacin. [Updated 2023 Jun 26]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2024. [Accessed 14 Aug. 2024] (online) Available from:
  4. Bush N, Sharma V, Chandrahasan K, Patil AN. Ofloxacin-ornidazole fixed-dose combination medication-induced pancreatitis with positive rechallenge. J Family Med Prim Care. 2020 Jun 30;9(6):3157-3159. [Accessed 14 Aug. 2024] (online) Available from:
  5. Ofloxacin and Ornidazole [FDA Label]. Bangalore, Karnataka: Micro Labs Ltd.; 2021. [Accessed 12 Jan. 2026] (online). Available from:
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User feedback

Twice A Day
84%
Once A Day
11%
Thrice A Day
5%
Bacterial infections
54%
Diarrhea
23%
Others
23%
Poor
44%
Excellent
33%
Average
22%
No Side Effect
60%
Headache
20%
Loss of appetite
20%
With food
75%
With or without food
25%
Not Expensive
50%
Average
50%
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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: Medley Pharmaceuticals
Address: Plot No. D2 Medley House,Street No. 6 M.I.D.C. Area, Andheri (East), Mumbai-400 093, INDIA

Vendor Details

Country of origin: India

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