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Opec M Suspension

Written By Dr. Anuj Saini, MMST, MBBS
Reviewed By Dr. Lalit Kanodia, MBA, MD Pharmacology
Last updated on 23 Sep 2025 | 05:12 PM (IST)
Opec M Suspension is an antibiotic medicine that is effective against a wide range of bacterial and parasitic infections, diarrhea, and dysentery. In children, it is used to treat infections of the teeth, lungs, gastrointestinal tract, urinary tract, and genital tract.
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Opec M Suspension
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Opec M Suspension image
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Your child’s medicine at a glance

Give Opec M Suspension to your child orally, preferably at a fixed time, either before or after food. It should be given to the child exactly as prescribed by the doctor. To maximize the benefits, follow all instructions carefully and get regular checkups to monitor the progress of the treatment. The dose and duration depend upon the type and severity of the infection, your child’s age, and body weight, so stick to the dose, time, and way prescribed by the doctor.


Some children may develop minor and temporary side effects after taking this medicine. These include nausea, vomiting, metallic taste, headache, loss of appetite, and abdominal cramps. These side effects usually go away once your child’s body adapts to the medicine. However, in case they persist for a long time or start bothering your child, you must consult your child’s doctor without any delay.


Your child’s doctor must be aware if your child has ever had any previous episodes of allergy, heart problems, liver impairment, or kidney malfunction. This will guide the doctor in planning your child’s overall treatment.

Uses of Opec M Suspension in children

Benefits of Opec M Suspension for your child

Treatment of Diarrhea
Diarrhea is an increase in the frequency of bowel movements or loose watery bowel movements. It can most commonly occur due to an infection of the digestive tract. Opec M Suspension helps to treat diarrhea that is caused due to bacteria or parasitic worm infections. This medicine can relieve frequent loose motions and also help you to stay well by preventing them from coming back. You need to take this medicine regularly to get the most out of it and you should drink plenty of fluids while taking it to make sure you stay hydrated.
Treatment of Dysentery
Dysentery or amoebic dysentery is a parasitic infection of the intestines that occurs mostly due to intake of contaminated food or water. The symptoms include loose stools (diarrhea), stomach cramps and stomach pain. Opec M Suspension helps to treat this infection by killing the infection causing parasites. It relieves these symptoms and also helps you to stay well by preventing them from coming back. You need to take this medicine regularly to get the most out of it and you should drink plenty of fluids while taking it to make sure you stay hydrated.
Treatment of Bacterial & parasitic infections
Opec M Suspension is an antibiotic medicine given to children to treat a wide range of bacterial and parasitic infections. These infections may include tooth abscess, gum infection, pneumonia, diarrhea, dysentery, burning sensation while passing urine, and genital tract infection. Opec M Suspension inhibits the growth of infection-causing organisms by stopping them from multiplying. Make sure to complete the full course of treatment even if your child feels better. Stopping the medicine abruptly by yourself may worsen your child’s condition or cause infection recurrence.

Side effects of Opec M Suspension in children

Opec M 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 Opec M
  • Vomiting
  • Nausea
  • Abdominal pain
  • Diarrhea
  • Loss of appetite
  • Headache
  • Dizziness
  • Metallic taste
  • Urine discoloration

How can I give Opec M 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. Opec M Suspension may be taken with or without food, but it is better to take it at a fixed time.

How Opec M Suspension works

Opec M Suspension is an antibiotic, having ofloxacin and metronidazole as its active ingredients. Both these medicines damage the DNA of the infection-causing bacteria and parasites, thus killing them by stopping their growth. This prevents the infection from spreading without making the bacteria resistant to further treatment.

Quick tips

  • If your child develops diarrhea as a side effect, encourage them to drink plenty of water.
  • Opec M Suspension may cause an altered taste. Eating citrus fruit or sipping plenty of water or fruit juice may help.
  • Do not give any calcium, magnesium, iron, vitamin, or antacid to your child within 2 hours of taking Opec M Suspension, as these can affect the absorption of the medicine.
  • Your child must complete the entire course of Opec M Suspension. Stopping too soon may cause the bacteria to multiply again, become resistant, or cause another infection.
  • Discontinue Opec M Suspension and inform the doctor immediately if your child develops a rash, itchy skin, swelling of the face and mouth, or difficulty in breathing.
  • Never save the medicine for future illnesses since its effectiveness in future infections cannot be guaranteed.

Safety advice

Kidney

Kidney

CONSULT YOUR DOCTOR
There is limited information available on the use of Opec M Suspension in patients with kidney disease. Please consult your doctor.
Liver

Liver

CONSULT YOUR DOCTOR
There is limited information available on the use of Opec M Suspension in patients with liver disease. Please consult your doctor.

Frequently asked questions

Although an extra dose of Opec M Suspension will not have any side effects, you must always be vigilant. If you think you have given too much Opec M Suspension to your child, immediately speak to a doctor. Overdose increases the risk of unwanted side effects such as seizures, tremors, severe headaches, sudden weakness, blood cell abnormalities, and rapid and irregular heartbeat. Rush to your child’s doctor on an immediate basis if you notice any of these symptoms.
Ineffective treatment with Opec M Suspension could mean 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 some other antibiotic, having a more specific action against the infection-causing bacteria.
Opec M Suspension can sometimes interact with other medicines or substances. Tell your doctor about any other medicines your child is taking before starting Opec M 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 from heart disease, genetic disorders involving blood vessels, seizures, psychiatric disorders, diabetes, photoallergy (allergy to sunlight), neuromuscular disorders, or rheumatoid arthritis. This is because there is a possibility that Opec M Suspension may aggravate these conditions and result in complications.
Yes, it is normal. Opec M Suspension contains an active ingredient called metronidazole, which can cause red-brown urine. It is a harmless side effect. It will subside once the medicine is stopped after the completion of the treatment.

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GASTRO INTESTINAL

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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: Shrinivas Gujarat Laboratories Pvt Ltd
Address: 604, Corporate House, Opp. Torrent House, Nr. Dinesh Hall, Ashram Road, Ahmedabad-380 009.

Vendor Details

Country of origin: India
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