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NAC Tablet is a combination medicine used in the treatment of common cold symptoms. It provides relief from a runny nose, sneezing, and congestion or stuffiness in the nose. It works by blocking the release of certain chemical messengers that cause pain and inflammation.

Written By Dr. Syeda Aafia, MBA, BDS,
Reviewed By Dr. Rajeev Sharma, MBA, MBBS,
Last updated on 22 May 2026 | 06:22 PM (IST)
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NAC Tablet image
NAC Tablet image

Product introduction

NAC Tablet can be taken with or without food. You should keep taking this medicine for as long as your doctor recommends. If you stop treatment too early your symptoms may come back and your condition may worsen. Let your doctor know about all other medications you are taking as some may affect, or be affected by this medicine.

Common side effects like nausea, vomiting, diarrhea, increased liver enzymes, and constipation may occur with this medicine. Most of these are temporary and usually resolve with time. Contact your doctor straight away if you are at all concerned about any of these side effects. This medicine can also cause sleepiness, so do not drive or do anything that requires mental focus until you know how this medicine affects you.

Before taking this medicine, you should tell your doctor if you have any kidney or liver diseases so that your doctor can prescribe a suitable dose for you. You should also tell your doctor if you are pregnant, planning pregnancy, or breastfeeding. Avoid drinking alcohol while taking this medicine as it can worsen your sleepiness.


Note: As per the Ministry of Health and Family Welfare, NAC Tablet is banned for children under 12 years of age.

Benefits of NAC Tablet

Common cold symptoms with fever
The common cold is a viral infection that affects the nose and throat, often causing a runny nose, sneezing, congestion, and sometimes fever. NAC Tablet helps relieve nasal and throat discomfort, eases congestion, and lowers fever, providing overall relief during the illness.

Side effects of NAC 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 NAC
  • Constipation
  • Sleepiness
  • Nausea
  • Vomiting
  • Diarrhea
  • Increased liver enzymes

How to use NAC 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. NAC Tablet may be taken with or without food.

How NAC Tablet works

NAC Tablet is a combination of two pain relievers (Nimesulide, Paracetamol), one antacid (Magnesium Trisilicate) and one antiallergic (Chlorpheniramine Maleate). The pain relievers work by blocking the release of certain chemical messengers that cause pain and fever. The antacid neutralizes the excess acid in the stomach and reduces side effects of the pain relievers. The antiallergic relieves allergy symptoms like runny nose, sneezing and watery eyes.

Quick tips

  • NAC Tablet is prescribed to get relief from symptoms of common cold.
  • Take exactly as directed by your doctor or on the label. Do not increase the dosage or take for longer than is recommended.
  • Call your doctor if your symptoms have not improved within seven days of treatment.
  • Inform your doctor if you are taking any other medications for cold.
  • Along with taking NAC Tablet do the following simple tips at home to get relief:
    1. Steam inhalation.
    2. Gargling with warm saltwater.
    3. Apply vapor rubs on chest, back if needed. Take enough rest.
    4. Take warm food and fluid only. Ensure adequate fluid intake.
    5. Advise hygiene measures to reduce spread: frequent hand-washing, avoiding sharing towels, pillowcases, etc.

Safety advice

Alcohol

Alcohol

UNSAFE
Do not drink alcohol while you are taking this medicine. NAC Tablet may cause excessive drowsiness when taken with alcohol.
Pregnancy

Pregnancy

UNSAFE
NAC Tablet is highly unsafe during pregnancy. It can cause serious harm to the unborn baby, including birth defects and pregnancy loss. Do not use this medicine if you are pregnant or planning to become pregnant.
Breast feeding

Breast feeding

CONSULT YOUR DOCTOR
NAC 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
NAC Tablet may decrease alertness, affect your vision, or make you feel sleepy and dizzy. Do not drive if these symptoms occur.
Kidney

Kidney

CAUTION
NAC Tablet should be used with caution in patients with severe kidney disease. Dose adjustment may be needed.
Liver

Liver

UNSAFE
NAC Tablet is unsafe to use in patients with liver disease and should be avoided.

Fact Box

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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: Nac International
Address: N-63, Pratap Nagar Metro, New Delhi 110007.

Vendor Details

Country of origin: India
A licensed vendor partner from your nearest location will deliver NAC Tablet. Once the pharmacy accepts your order, the details of the pharmacy will be shared with you. Acceptance of your order is based on the validity of your doctor's ℞ and the availability of this medicine.

In case of any issues, contact us

Email ID: [email protected]
Phone Number: 0124-4166666
Address: 5th Floor Tower - B of the Presidency Building, 46/4 Mehrauli Gurgaon Road, Sector 14, Gurugram, Haryana-122001, India
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