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AC 4

AC 4 Products are primarily used for
Tuberculosis (TB)

Products for AC 4

AC 4 Kit
strip of 5 kit
MRP₹14.13
Not Available

About AC 4 Products

uses

Uses of AC 4 Products

Isoniazid+Rifampicin+Ethambutol+Pyrazinamide is used in the treatment of tuberculosis.
side effects

AC 4 Products side effects

Common
Side Effects of AC 4 are Lethargy, Low blood platelets, Joint pain, Thrombocytopenic purpura, Cutaneous reactions, Retrobulbar optic neuritis, Vomiting, Nausea, Peripheral neuropathy (tingling and numbness of feet and hand), Abdominal pain, Skin rash, Hepatitis (viral infection of liver).
Severe
Side Effects of AC 4 are Hypersensitivity, Gout precipitation, Breast enlargement in male, Toxic epidermal necrolysis, Stevens-Johnson syndrome.

How AC 4 Products work

Isoniazid + Rifampicin + Ethambutol + Pyrazinamide is a combination of four medicines:

In Depth Information for AC 4 Products

  • You have been prescribed AC 4 for the treatment of tuberculosis.
  • Take it on an empty stomach and preferably at the same time everyday.
  • Try not to forget a dose, as this increases the risk of the bacteria becoming resistant to the medicine, and also increases the risk of getting side effects.
  • It may discolour your urine, sweat, saliva and tears a reddish/orange colour. This is normal and not harmful.
  • Your doctor may check your liver function before starting treatment and regularly thereafter. Inform your doctor if you notice yellowing of eyes or skin, dark urine, or stomach pain.
  • Avoid drinking alcohol while taking AC 4 as this may increase the risk of side effects on the liver.
  • It may cause vitamin B6 deficiency. Your doctor may prescribe vitamin B6 supplements to help avoid potential problems associated with its deficiency, such as inflammation of the nerves (neuritis). 
  • Use a reliable contraceptive method (such as condoms or a diaphragm) to prevent pregnancy while you are taking AC 4 as it may make hormonal contraceptives such as the pill less effective.
  • Do not take indigestion remedies (antacids)  within at least two hours of taking AC 4.
  • Finish the full course of the medication, even if you feel better. Stopping the course early increases the risk of coming back of the infection.

Patient Concerns about AC 4 Products

Frequently asked questions about AC 4 Products

Q. How to take AC 4 Kit?

Take AC 4 Kit on an empty stomach which means at least one hour before and two hours after a meal and with full glass of water.

Q. Can I drink alcohol while taking AC 4 Kit?

No, avoid drinking alcohol while taking AC 4 Kit. Drinking alcohol will increase the risk of hepatitis caused by AC 4 Kit because of isoniazid.

Q. Can the use of AC 4 Kit cause discoloration of the urine?

Yes, AC 4 Kit contains Rifampicin. It can cause temporary discoloration of your teeth, sweat, urine, saliva and tears (red, orange or brown color). This side effect is usually not harmful. However, discoloration of urine can be a sign of liver damage. Contact your doctor if you notice discoloration of urine accompanied with stomach pain, loss of appetite and jaundice (yellowing of your skin or eyes).

Q. Can AC 4 Kit cause visual impairment?

AC 4 Kit contains Ethambutol which may cause visual impairment. Inform the doctor immediately if you notice any changes in your eyesight.

Q. Can I discontinue AC 4 Kit if I feel well?

No, do not discontinue AC 4 Kit. Take the proper course of a drug that has been prescribed for you even if you begin to feel better. If you stop taking AC 4 Kit then your infection may become worse, difficult to treat and it may result in drug-resistant TB (drugs you are taking may no longer work).

Q. Can I take oral contraceptive pills while taking AC 4 Kit?

No, AC 4 Kit can make birth control pills less effective. So, ask your doctor about using a birth control method which does not affect your hormone levels (such as a condom, diaphragm, spermicide).

Q. What are the instructions for storage and disposal of AC 4 Kit?

Keep this medicine in the container it came in, tightly closed. Store it according to the instructions mentioned on the pack or label. Dispose of the unused medicine. Make sure it is not consumed by pets, children and other people.
Information last updated by Dr. Varun Gupta, MD Pharmacology on 11th Jun 2025.
The medicine details are for information purpose only. Consult a doctor before taking any medicine.