Healthy Inc > Blog > Ethambutol BP/USP/IP
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What is ethambutol 400mg used for?

In the pharmaceutical industry, Ethambutol 400 mg is a foundational antimycobacterial agent specifically used in the treatment of Tuberculosis (TB). As a pharmacist and manufacturer, I classify this as a core component of “First-Line” TB therapy, almost always used in combination with other drugs like Isoniazid, Rifampicin, and Pyrazinamide.

At your WHO-GMP facility in Mumbai, you likely manufacture this in 400 mg and 800 mg tablets to support the RNTCP (Revised National TB Control Program) or international DOTS programs.

Primary Clinical Indications

  • Pulmonary Tuberculosis: Used to treat active TB infections of the lungs.

  • Extrapulmonary Tuberculosis: Indicated for TB affecting other organs, such as the lymph nodes, bones, or kidneys.

  • MAC Infections: Used to treat Mycobacterium avium complex, particularly in immunocompromised patients.

Mechanism: Cell Wall Synthesis Inhibition

Ethambutol is primarily bacteriostatic, meaning it prevents the bacteria from multiplying.

Enzyme Targeting: It inhibits the enzyme arabinosyl transferase.

Disrupting the Wall: This enzyme is essential for synthesizing arabinogalactan, a critical component of the mycobacterial cell wall.

Increased Permeability: By damaging the cell wall, Ethambutol makes the bacteria more vulnerable and enhances the penetration of other TB drugs like Isoniazid.

The Pharmacist’s “Technical Warning”

As you promote your firm on digital platforms, highlighting these technical nuances is essential for clinical authority:

  • Optic Neuritis: The most significant side effect is inflammation of the optic nerve. Patients must be advised to report any changes in visual acuity or red-green color blindness immediately.

  • Renal Monitoring: Since Ethambutol is primarily excreted by the kidneys, the 400 mg dose may need adjustment in patients with renal impairment.

  • Uric Acid Levels: It can decrease the excretion of uric acid, potentially triggering Gout in susceptible patients.

The Manufacturer’s Perspective: Technical & Export

From a production and B2B standpoint at your facility in Mumbai:

  • The “FDC” Strategy: On your marketplace, highlight your Fixed-Dose Combinations (FDCs) (e.g., 3-FDC or 4-FDC). FDCs are the global standard for improving patient compliance in TB treatment and are highly sought after by international health ministries.

  • Stability for Export: Ethambutol is stable but moisture-sensitive. Utilizing Alu-Alu blister packaging ensures a 36-month shelf life, which is critical for export to Zone IVb tropical regions in Africa and SE Asia.

  • Dossier Support: We provide full CTD/eCTD Dossiers to support your firm’s registration in regulated markets and for bidding on WHO pre-qualification tenders.

Ethambutol Tablets

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What is ethambutol hydrochloride 200 mg used for?

In the pharmaceutical industry, Ethambutol Hydrochloride 200 mg is a specific bacteriostatic antimycobacterial agent. As a pharmacist, I characterize this 200 mg strength as a fundamental component of the RHE (Rifampicin, Hyrazinamide, Ethambutol) or RHZE intensive-phase tuberculosis treatment, often utilized in weight-based dosing for pediatric or low-body-weight adult patients.

Primary Clinical Uses

  • Pulmonary Tuberculosis (TB): Used as part of a multi-drug regimen to treat active TB caused by Mycobacterium tuberculosis. It is never used alone to prevent the rapid development of drug resistance.

  • Extrapulmonary Tuberculosis: Indicated for TB infections outside the lungs, such as TB meningitis or miliary tuberculosis.

  • Mycobacterium Avium Complex (MAC): Used to treat and prevent disseminated MAC infections, particularly in immunocompromised patients (such as those with HIV).

Mechanism of Action

Ethambutol works by disrupting the structural integrity of the bacterial cell wall.

  1. Enzyme Inhibition: It specifically inhibits the enzyme arabinosyltransferase.

  2. Cell Wall Disruption: This enzyme is responsible for the synthesis of arabino-galactan, a critical component of the mycobacterial cell wall.

  3. Growth Arrest: By halting the production of this structural “glue,” the cell wall becomes permeable and incomplete, effectively stopping the bacteria from dividing and spreading.

The Manufacturer’s Perspective: Formulation & Export

From a manufacturing and global trade standpoint, Ethambutol 200 mg is a high-volume “Essential Medicine” with specific technical requirements:

  • Hygroscopic API: Ethambutol Hydrochloride is highly hygroscopic (it absorbs moisture from the air). As a WHO-GMP manufacturer, we maintain strict humidity controls during the compression process and utilize Alu-Alu blister packaging to ensure a stable 36-month shelf life for export to Zone IVb regions.

  • Assay Precision: Because TB treatment requires precise weight-based dosing (typically 15–25 mg/kg), we ensure absolute content uniformity in the 200 mg tablet to guarantee the patient receives the exact therapeutic dose.

  • Public Health Tenders: This product is a staple for the World Health Organization (WHO), the Global Fund, and national TB programs. Our Mumbai-based facility provides the CTD/eCTD Dossiers and stability data required for international registration.

  • Pharmacovigilance (Ocular Toxicity): As a pharmacist, you know Ethambutol carries a risk of optic neuritis. We ensure our Product Information Leaflets (PIL) emphasize the need for baseline and periodic visual acuity tests.

Rifampicin Isoniazid Ethambutol Tablets

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