Overview
Uses and benefits
Side effects
How to use
How drug works
Safety advice
Missed dose
All substitutes
Quick tips
Fact box
Patient concerns
FAQs

Author Details

Written By

Dr. Syeda Aafia

MBA, BDS

Reviewed By

Dr. Sachin Gupta

MD Pharmacology, MBBS

Last updated

17 Dec 2025 | 04:35 PM (IST)

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Secnil 500mg Injection

Prescription Required

Marketer

Abbott

SALT COMPOSITION

Secnidazole (500mg)

Storage

Store below 30°C

Product introduction

Secnil 500mg Injection 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.

Secnil 500mg Injection helps prevent an infection after surgery. It is also used in the treatment of dental infections, leg ulcers, and pressure sores. This injection is administered under the supervision of a healthcare professional. Your symptoms may get better after a short time but you should finish the full course of treatment, even if you feel well, otherwise, the infection may come back. Do not drink any alcohol while taking this medicine and for some days after stopping it. Otherwise, you may get unpleasant side effects like nausea, vomiting, and stomach pain.

The most common side effects of this medicine are headache, nausea, vomiting, diarrhea, and dryness or metallic taste in the mouth. These are usually mild but let your doctor know if they bother you or last more than a few days. You can try using sugarless candies or lozenges to overcome any dryness or metallic taste in the mouth.

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 Secnil Injection

Bacterial & parasitic infections

Benefits of Secnil Injection

In Bacterial & parasitic infections

Secnil 500mg Injection helps treat many different infections caused by bacteria and other parasites. It works by killing and stopping the growth of the bacteria and parasites that cause the infection. This medicine usually makes you feel better quite quickly. However, you should continue using it as long as it is prescribed even when you feel better, to make sure that all bacteria and parasites are killed and the infection does not return back.

Side effects of Secnil Injection

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 Secnil

Headache
Diarrhea
Nausea
Vomiting
Dryness in mouth
Metallic taste

How to use Secnil Injection

Your doctor or nurse will give you this medicine. Kindly do not self administer.

How Secnil Injection works

Secnil 500mg Injection is an antibiotic. It kills the bacteria and other microorganisms that cause infections by damaging their DNA.

Safety advice

Alcohol

UNSAFE

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

Pregnancy

CONSULT YOUR DOCTOR

The safety of Secnil 500mg Injection 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

CAUTION

Secnil 500mg Injection should be used with caution during breastfeeding. Breastfeeding should be held until the treatment of the mother is completed and the drug is eliminated from the body.

Driving

UNSAFE

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

Kidney

CONSULT YOUR DOCTOR

There is limited data available on the use of Secnil 500mg Injection in patients with kidney disease. Please consult your doctor.

Liver

SAFE IF PRESCRIBED

Secnil 500mg Injection is probably safe to use in patients with liver disease. Limited data suggest dose adjustment may not be needed.

What if you forget to take Secnil Injection?

If you miss a dose of Secnil 500mg Injection, please consult your doctor.

All substitutes

For informational purposes only. Consult a doctor before taking any medicines.

No substitutes found for this medicine

Quick tips

Secnil 500mg Injection treats infections caused by bacteria and parasites.
It may also be used to prevent infections following surgery.
Always take the complete course of treatment, as advised by your doctor, even if you feel better.
It may cause side effects like nausea, stomach upset, and a metallic taste in the mouth.
Do not drink alcohol during or for 2-3 days after treatment with this medicine. You may develop nausea, vomiting, flushing and headache.
Inform your doctor if you have liver disease. Your dose may need to be adjusted in severe liver disease.
Secnil 500mg Injection treats infections caused by bacteria and parasites.
It may also be used to prevent infections following surgery.
Always take the complete course of treatment, as advised by your doctor, even if you feel better.
It may cause side effects like nausea, stomach upset, and a metallic taste in the mouth.
Secnil 500mg Injection 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 2-3 days after treatment with this medicine. You may develop nausea, vomiting, flushing and headache.
Inform your doctor if you have liver disease. Your dose may need to be adjusted in severe liver disease.

Fact Box

Chemical Class

Nitroimidazole derivative

Habit Forming

Therapeutic Class

ANTI INFECTIVES

Action Class

Antiprotozoal & Antibacterial- Nitroimidazoles

Patient concerns

Scar on face due to bacterial infections

Dr. Atul Jain

Dermatology

Pic is not clear, plz visit for proper opinion

I have a history of recurring yeast and bacterial vaginosis infections.

Dr. Sonu Balhara Ahlawat

Obstetrics and Gynaecology

Tab metrogyl 500 mg twice a day x 5 days and tab fluconazole 150 mg three doses alternate days

Is Secnil 500mg Injection effective?

Secnil 500mg Injection is effective if used in the dose and duration advised by your doctor. Do not stop taking it even if you see improvement in your condition. If you stop using Secnil 500mg Injection too early, the symptoms may return or worsen.

How is Secnil 500mg Injection administered?

Secnil 500mg Injection should be administered under the supervision of a trained healthcare professional or a doctor only and should not be self-administered. The dose will depend on the condition you are being treated for and will be decided by your doctor. Follow your doctor’s instructions carefully to get maximum benefit from Secnil 500mg Injection.

Why is it harmful to drink alcohol while using Secnil 500mg Injection?

Alcohol should be strictly avoided while taking Secnil 500mg Injection and for at least 3 days after completely stopping the medicine. Drinking alcohol can cause an unpleasant reaction (Disulfiram reaction) with symptoms such as stomach pain, nausea, vomiting, headache, flushing or redness of the face.

Is Secnil 500mg Injection safe?

Secnil 500mg Injection 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 instructions carefully and let your doctor know if any of the side effects bother you.

What are the side effects of Secnil 500mg Injection?

The most common side effects of Secnil 500mg Injection are headache, nausea or vomiting, diarrhea, abdominal pain, vaginal yeast infection and vaginal itching. These side effects are usually not bothersome. But if you are concerned or if any of these persists for a long duration, consult your doctor.

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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.