Common Visual impairment, Color blindness.

Expert advice for Etol Tablet
Do consult your doctor before taking ethambutol if you have any eye problems such as cataracts (disturbed vision due to clouding of eye lenses) , recurrent inflammatory conditions of the eye, optic neuritis (inflammation of nerve fibers that transmit visual information from your eye to the brain), and diabetic retinopathy (a complication of eye due to diabetes). Ethambutol can cause serious eye damage. Regular eye checkups are recommended while on treatment with ethambutol.
Do consult your doctor before taking ethambutol:

If you have kidney problems.
If you have liver problems.
If you have gout (pain, swelling, redness and stiffness in joints due to accumulation of uric acid).

Ethambutol is not recommended for use in children aged below 3 years.
Do consult your doctor before taking ethambutol if you are pregnant or planning to become pregnant.
Do consult your doctor before taking ethambutol if you are breastfeeding.
Do not stop taking ethambutol without consulting your doctor. If you forget to take a dose of ethambutol, take it as soon as you remember. Do not double the dose to make up for the missed dose.

Q. Does Etol cause blindness?
Optic neuritis (inflammation of nerve fibers that transmit visual information from your eye to the brain) is one of the side effects of Etol which causes several forms of eye defect. Although these conditions are reversible upon discontinuation of the drug, rare cases of irreversible blindness have also been reported. Please contact your doctor immediately if you notice any of these symptoms: decreased clearness of vision, loss of vision, disturbed vision due to blind spots, color blindness, visual field defect and eye pain

Q. Does Etol induce hyperuricemia/how does Etol induce hyperuricemia?
Yes. Increase in blood levels of uric acid is a side effect of Etol. It increases the retention of uric acid in the body by decreasing the excretion of urates (uric acid) by the kidneys

Q. How does Etol work in the body?
Etol is an antibiotic effective against tuberculosis causing bacteria. It suppresses the growth of the bacteria by interfering with the formation of the outer protective covering (cell wall) of the bacteria, thereby weakening the bacteria

Q. What is Etol toxicity/How does Etol cause optic neuritis/how does Etol affect vision?
Etol toxicity involves toxic effects on the eyes (optic neuritis/optic neuropathy) which are related to the dose and duration of Etol treatment. It causes optic neuritis (inflammation of nerve fibers in the eye) by interfering with important cellular activities (mitochondrial toxicity) in the nerve cells and inducing nerve damage (neuropathy) thereby affecting the transmission of visual information from the eye to brain. The symptoms of Etol induced optic neuritis include: decreased clearness of vision, loss of vision, disturbed vision due to blind spots, color blindness, visual field defect and eye pain

Q. What does Etol treat?
Etol is an antibiotic effective against tuberculosis causing bacteria. It is used in the prevention, treatment and second time treatment of tuberculosis (a serious infection caused by bacteria that affects the lungs and in certain cases other parts of the body)

Q. Is Etol bacteriostatic or bactericidal?
Etol is both a bacteriostatic and a bactericidal antibiotic. It suppresses the growth of bacteria (bacteriostatic) by interfering with the formation of the outer protective covering (cell wall) of the bacteria, thereby weakening it and causing cell death in certain cases (bactericidal)

Q. Is Etol hepatotoxic?
Liver toxicities are among the known side effects of Etol. Inflammation of liver (hepatitis), abnormal liver function causing yellowing of skin and eyes (jaundice), abnormal liver function tests (blood tests to assess health of liver) and very rarely liver failure have been noted in patients receiving multi drug (including Etol) treatment for tuberculosis. Please contact your doctor before taking Etol if you have any liver problems

Q. Is Etol toxicity reversible?
In most cases Etol toxicities are related to dose (depends upon the quantity of Etol you take) and duration of treatment and are reversible upon discontinuation. However, serious irreversible damage to eye and liver has been reported in rare cases

Q. Is Etol chemotherapy?
Etol is an antibiotic used in the treatment of tuberculosis. Do not confuse it with chemotherapy or chemo drugs used for the treatment of cancer

Q. Etol is effective against?
Etol is effective against most tuberculosis causing bacteria belonging to Mycobacterium family (M. tuberculosis, M. avium complex, M. kansasii, M. marinum).