Ethambutol Hydrochloride

Ethambutol Hydrochloride

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Questions & Answers

Side Effects & Adverse Reactions

ETHAMBUTOL may produce decreases in visual acuity which appear to be due to optic neuritis. This effect may be related to dose and duration of treatment. This effect is generally reversible when administration of the drug is discontinued promptly. However, irreversible blindness has been reported. (See PRECAUTIONS and ADVERSE REACTIONS).

Liver toxicities including fatalities have been reported (see ADVERSE REACTIONS). Baseline and periodic assessment of hepatic function should be performed.


Legal Issues

There is currently no legal information available for this drug.

FDA Safety Alerts

There are currently no FDA safety alerts available for this drug.

Manufacturer Warnings

There is currently no manufacturer warning information available for this drug.

FDA Labeling Changes

There are currently no FDA labeling changes available for this drug.


ETHAMBUTOL HCI is indicated for the treatment of pulmonary tuberculosis. It should not be used as the sole antituberculous drug, but should be used in conjunction with at least one other antituberculous drug. Selection of the companion drug should be based on clinical experience, considerations of comparative safety, and appropriate in vitro susceptibility studies. In patients who have not received previous antituberculous therapy, ie, initial treatment, the most frequently used regimens have been the following:

  ETHAMBUTOL HCI plus isoniazid   ETHAMBUTOL HCI plus isoniazid plus streptomycin.

In patients who have received previous antituberculous therapy, mycobacterial resistance to other drugs used in initial therapy is frequent. Consequently, in such retreatment patients, ETHAMBUTOL HCI should be combined with at least one of the second line drugs not previously administered to the patient and to which bacterial susceptibility has been indicated by appropriate in vitro studies. Antituberculous drugs used with ETHAMBUTOL HCI have included cycloserine, ethionamide, pyrazinamide, viomycin and other drugs. Isoniazid, aminosalicylic acid, and streptomycin have also been used in multiple drug regimens. Alternating drug regimens have also been utilized.



There is currently no drug history available for this drug.

Other Information

ETHAMBUTOL HYDROCHLORIDE is an oral chemotherapeutic agent which is specifically effective against actively growing microorganisms of the genus Mycobacterium, including M. tuberculosis. The structural formula is:


ETHAMBUTOL HYDROCHLORIDE (HCI) 100 and 400 mg tablets contain the following inactive ingredients: Gelatin, Hydroxypropyl Methylcellulose, Magnesium Stearate, Sodium Lauryl Sulfate, Sorbitol, Stearic Acid, Sucrose, Titanium Dioxide and other ingredients.


Ethambutol Hydrochloride Manufacturers

  • Remedyrepack Inc.
    Ethambutol Hydrochloride Tablet, Film Coated [Remedyrepack Inc. ]
  • American Health Packaging
    Ethambutol Hydrochloride Tablet [American Health Packaging]
  • State Of Florida Doh Central Pharmacy
    Ethambutol Hydrochloride Tablet [State Of Florida Doh Central Pharmacy]
  • Lupin Pharmaceuticals Inc
    Ethambutol Hydrochloride (Ethambutol Hydrochloride) Tablet [Lupin Pharmaceuticals Inc]
  • Remedyrepack Inc.
    Ethambutol Hydrochloride (Ethambutol Hydrochloride) Tablet [Remedyrepack Inc. ]
  • Remedyrepack Inc.
    Ethambutol Hydrochloride Tablet [Remedyrepack Inc. ]
  • Sti Pharma
    Ethambutol Hydrochloride Tablet, Film Coated [Sti Pharma]
  • Sti Pharma Llc
    Ethambutol Hydrochloride Tablet, Film Coated [Sti Pharma Llc]
  • Remedyrepack Inc.
    Ethambutol Hydrochloride Tablet [Remedyrepack Inc. ]
  • Barr Laboratories Inc.
    Ethambutol Hydrochloride Tablet, Film Coated [Barr Laboratories Inc.]
  • Carilion Materials Management
    Ethambutol Hydrochloride Tablet [Carilion Materials Management]

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