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Secnitor 500mg Tablet

Written By Dr. Anuj Saini, MMST, MBBS
Reviewed By Dr. Rajeev Sharma, MBA, MBBS
Last updated on 09 Feb 2026 | 03:40 PM (IST)
Secnitor 500mg Tablet is an antibiotic medicine that helps your body fight infections caused by bacteria and parasites. It is used to treat infections of the liver, stomach, intestines, vagina, brain, heart, lungs, and skin.
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General Information

Contains

Secnidazole (500mg)

Marketer

Torrent Pharmaceuticals Ltd

Storage

Store below 30°C
The content is shown in English
Secnitor 500mg Tablet image
Secnitor 500mg Tablet image

Product introduction

Secnitor 500mg Tablet is also used in the treatment of dental infections, leg ulcers, and pressure sores. You can take this medicine with or without food. The amount you are advised will depend on what you are being treated for and how bad it is, but you should take this antibiotic exactly as prescribed by your doctor.


Your symptoms may improve quickly, but continue taking the medicine for the full course, even if you feel fine. If you stop taking it early, some bacteria may survive, and the infection may come back. Do not drink any alcohol while taking this medicine and for some days after stopping it, as that may cause some side effects.


The most common side effects of this medicine include gastrointestinal disturbances, nausea, abdominal pain, dry mouth, a metallic taste, glossitis, and stomatitis. These side effects are usually mild, but inform your doctor if they persist or cause discomfort. Sucking on sugar-free candies or lozenges may help relieve dry mouth and the metallic taste.


Before using this medicine, inform your doctor if you are allergic to any medicine or have any kidney or liver problems, or any disease of the nervous system. Your doctor may change the dose or prescribe a different medicine. This medicine should not be taken if you are pregnant or breastfeeding unless it is necessary and prescribed by your doctor.

Uses of Secnitor Tablet

  • Bacterial & parasitic infections

Benefits of Secnitor Tablet

Bacterial & parasitic infections
Secnitor 500mg Tablet helps treat many different infections such as those of the liver, stomach, intestines, vagina, brain, heart, lungs, bones, and skin that are caused by bacteria and parasites. It works by stopping the growth of the bacteria causing the infection. It 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 Secnitor Tablet

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 Secnitor
  • Nausea
  • Gastrointestinal disturbance
  • Abdominal pain
  • Metallic taste
  • Glossitis (tongue inflammation)
  • Stomatitis (Inflammation of the mouth)

How to use Secnitor Tablet

Take this medicine in the dose and duration as advised by your doctor. Swallow it as a whole. Do not chew, crush or break it. Secnitor 500mg Tablet may be taken with or without food.

How Secnitor Tablet works

Secnitor 500mg Tablet is an antibiotic used to treat certain bacterial and parasite infections. It works by damaging the DNA of the infection-causing microorganisms, which stops them from growing and causes them to die.

Quick tips

  • Follow the full course of treatment as prescribed by your doctor, even if you start feeling better.
  • Secnitor 500mg Tablet may cause side effects such as nausea, stomach discomfort, and a metallic taste in the mouth.
  • Secnitor 500mg Tablet used in a high dose or for a prolonged time increases the risk of side effects such as nerve damage. Take it only as prescribed by your doctor.
  • Do not drink alcohol during or for at least 2 days after treatment with this medicine. You may develop nausea, vomiting, flushing, and headache.
  • Inform your doctor if you have liver disease. In cases of severe liver disease, your dosage may require adjustment.

Safety advice

Alcohol

Alcohol

UNSAFE
Consumption of alcohol with Secnitor 500mg Tablet may cause a disulfiram-like reaction, leading to symptoms such as flushing, increased heart rate, low blood pressure, nausea, lightheadedness, and severe headache.
Pregnancy

Pregnancy

CONSULT YOUR DOCTOR
The safety of Secnitor 500mg Tablet during pregnancy has not been established. There are no adequate and well-controlled studies in pregnant women, and animal data on reproductive toxicity are insufficient. Your doctor will weigh the benefits and any potential risks before prescribing.
Breast feeding

Breast feeding

CONSULT YOUR DOCTOR
Secnitor 500mg Tablet may be unsafe to use during breastfeeding. Limited human data suggests that the drug may pass into the breastmilk and harm the baby. It should be used only if the expected benefit outweighs the potential risk. Please consult your doctor.
Driving

Driving

UNSAFE
Secnitor 500mg Tablet may decrease alertness, affect your vision, or make you feel sleepy and dizzy. Do not drive if these symptoms occur.
Kidney

Kidney

CONSULT YOUR DOCTOR
There is limited data available on the use of Secnitor 500mg Tablet in patients with kidney disease. Please consult your doctor.
Liver

Liver

SAFE IF PRESCRIBED
Secnitor 500mg Tablet is probably safe to use in patients with liver disease. Limited data suggest dose adjustment may not be needed.

Frequently asked questions

Secnitor 500mg Tablet works best when taken at the prescribed dose and duration recommended by your doctor. Do not stop taking it even if you see improvement in your condition. If you stop using Secnitor 500mg Tablet too early, the symptoms may return or worsen.
If you forget a dose of Secnitor 500mg Tablet, take it as soon as you remember. However, if it is almost time for your next dose, skip the missed dose and take the next scheduled dose at the prescribed time. Do not double the dose to make up for the missed one, as this may increase the chances of developing side effects.
Alcohol should be avoided while taking Secnitor 500mg Tablet. Moreover, you should avoid alcohol for at least 2 days after finishing the complete course. Drinking alcohol can cause an unpleasant reaction (disulfiram reaction) with symptoms such as stomach pain, nausea, vomiting, headache, flushing, or redness of the face.
Secnitor 500mg Tablet 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 advice closely and inform them if you experience any bothersome side effects.
No, do not stop taking Secnitor 500mg Tablet. Complete the full course of treatment even if you feel better. Your symptoms may improve before the infection is completely cured. Hence, if you stop taking the medicine before completing the course, your infection may come back. Consult your doctor before you stop taking Secnitor 500mg Tablet and follow their advice.
Secnitor 500mg Tablet may cause common side effects such as headaches, nausea, vomiting, diarrhea, stomach pain, and vaginal yeast infection or itching. These side effects are usually not bothersome. But if you are concerned or if any of these persist for a long duration, consult your doctor.

Fact Box

Chemical Class

Nitroimidazole derivative

Habit Forming

No

Therapeutic Class

ANTI INFECTIVES

Action Class

Antiprotozoal & Antibacterial- Nitroimidazoles

References

  1. Secnidazole [Prescribing Information]. Baltimore, MD: Lupin Pharmaceuticals, Inc.; 2022. [Accessed 03 Feb. 2025] (online) Available from:
  2. Secnidazole [Product Information]. Dhaka, Bangladesh: Square Pharmaceuticals Ltd. [Accessed 24 Apr. 2025] (online) Available from:
  3. Central Drugs Standard Control Organisation (CDSCO). [Accessed 29 Mar. 2019] (online) Available from:
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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: Torrent Pharmaceuticals Ltd
Address: Off. Ashram Road, Ahmedabad - 380 009., Gujarat, India

Vendor Details

Country of origin: India

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