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What Is Myambutol?

What Is Myambutol?

Myambutol is a prescription medicine containing ethambutol, an antibiotic primarily used to treat tuberculosis (TB). Tuberculosis is a serious infection caused by the bacterium Mycobacterium tuberculosis, mainly affecting the lungs but sometimes involving other organs, such as the spine, kidneys, or brain. Myambutol is not used by itself. It is combined with other TB medicines to prevent resistance and fully treat the infection. It is available as an oral tablet and is usually taken once daily.

Quick Facts About Myambutol

Quick Facts About Myambutol

Product NameMyambutol
Active IngredientEthambutol Hydrochloride
Drug ClassAntitubercular agents
Available FormsOral tablets
Strengths Available100 mg and 400 mg
Routes of AdministrationTaken by mouth
Myambutol UsesTreats:
Active pulmonary tuberculosis

Extrapulmonary tuberculosis
Myambutol StorageStore at room temperature between 20°C and 25°C (68°F and 77°F)
Pregnancy and BreastfeedingConsult a doctor
Legal StatusRx only

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What Is Myambutol Used For?

What Is Myambutol Used For?

Myambutol is FDA-approved to treat:

  • Active pulmonary tuberculosis (TB)
  • Extrapulmonary tuberculosis

Myambutol is not a standalone medication but is used along with other medicines to treat tuberculosis.

How Does Myambutol Work?

How Does Myambutol Work?

Myambutol (ethambutol) works by interfering with bacterial cell wall synthesis. It mainly works by:

  • It inhibits an enzyme involved in cell wall formation (arabinosyl transferase).
  • It disrupts arabinogalactan synthesis, a key component of the mycobacterial cell wall.
  • Weakens the bacterial cell wall.
  • Stops bacterial growth (bacteriostatic effect).

By weakening the bacterial cell wall, the drug helps other tuberculosis medicines work more effectively.

What Are the Precautions of Myambutol?

What Are the Precautions of Myambutol?

If you are diagnosed with tuberculosis (TB) and starting the treatment, you should carefully check the following Myambutol precautions. It is crucial to inform your healthcare professional if you have:

  • History of optic neuritis
  • Vision problems
  • Liver issues
  • Kidney disease
  • Diabetes
  • History of gout or gouty arthritis
  • Ethambutol may increase uric acid levels and precipitate gout
  • Any other chronic conditions

Important Information: Eye monitoring is essential before starting the tuberculosis treatment. Myambutol can affect your vision, so your doctor may examine you before and during treatment.

What Are the Warnings of Myambutol?

What Are the Warnings of Myambutol?

Your doctor may stop or change your medication if you experience the following symptoms:

  • Reduced visual sharpness
  • Blurred vision
  • Vision loss in one or both eyes
  • Difficulty seeing colors (specifically red and green colors)
  • Yellowing of the eyes or skin (jaundice)
  • Severe fatigue
  • Dark urine
  • Persistent vomiting or nausea
  • Inflammation of joints
What Are the Side Effects of Myambutol (ethambutol)?

What Are the Side Effects of Myambutol (ethambutol)?

The table below summarizes possible side effects of Myambutol. If you experience any usual Myambutol side effects, consult your doctor immediately.

Common Side Effects of MyambutolSudden vision lossRare Side Effects of Myambutol
Loss of appetiteEye painLiver injury
NauseaSkin rashSevere allergic reaction
VomitingVisual disturbancesDifficulty breathing
HeadacheNumbness or tinglingBlood disorders (thrombocytopenia, leukopenia)
Mild stomach upsetJoint painSudden vision loss
DizzinessIncreased uric acid levelsSevere rash
DiarrheaFeverSwelling of the throat or face

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Who Should Not Take Myambutol?

Who Should Not Take Myambutol?

Myambutol is contraindicated in patients who have:

  • Optic neuritis (unless they can be monitored closely)
  • Hypersensitivity to ethambutol
  • Patients unable to appreciate or report visual side effects (e.g., young children or unconscious individuals).
How to Take Myambutol Tablets?

How to Take Myambutol Tablets?

Follow the directions as prescribed by your healthcare provider.

  • You can take Myambutol with or without food.
  • The dose is usually taken once daily.
  • Complete the course of tuberculosis treatment that typically lasts at least 6 months (may be longer depending on regimen).
  • Do not skip a dose.
What Happens If You Take Too Much Myambutol?

What Happens If You Take Too Much Myambutol?

In case of a Myambutol overdose, contact your healthcare provider or seek immediate medical attention. Even if there are no symptoms, call the Poison Control Center immediately.

What to Do If You Miss a Dose of Myambutol?

What to Do If You Miss a Dose of Myambutol?

If you forget to take a Myambutol tablet at the regular time, take it as soon as possible. If you are unable to take the tablet on the same day, take it the next day as usual. Do not double the dose, as this can cause severe adverse effects.

What Are the Storage Guidelines for Myambutol?

What Are the Storage Guidelines for Myambutol?

  • Keep the medication at controlled room temperature between 20°C and 25°C (68°F and 77°F).
  • Keep the Myambutol tablets in a tightly closed container.
  • Store in a cool, dry place, away from direct sunlight and moisture.
  • Keep it out of reach of pets and children.
  • Do not keep the medicine in the bathroom.
What Medications Interact with Myambutol?

What Medications Interact with Myambutol?

Several medicines are known to interact with Myambutol. Some of them are listed below:

  • Amiodarone
  • Adcetris
  • Isoniazid
  • Apresoline
  • Nydrazid
  • Lipitor
  • Rifampin
  • Trecator-SC
  • Auranofin
  • BCG vaccine
  • Cholera vaccine

Note: Avoid taking aluminum-containing antacids within several hours of Myambutol tablets, as they can reduce their effectiveness.

What Are the Alternatives to Myambutol?

What Are the Alternatives to Myambutol?

If Myambutol tablets are unavailable, consider the following Myambutol alternatives for treating tuberculosis.

  • Isoniazid
  • Pyrazinamide
  • Rifampin
  • Streptomycin

Do not switch to these alternatives without consulting your healthcare professional.

Why Buy Myambutol Online from Polar Bear Meds?

Why Buy Myambutol Online from Polar Bear Meds?

Myambutol may be expensive at some U.S. pharmacies. At Polar Bear Meds, we help you access your prescribed medications at more affordable prices by sourcing them through fully licensed Canadian and international pharmacy partners.

You can buy Myambutol online in Canada from Polar Bear Meds and receive several benefits:

  • Competitive pricing on genuine, prescription-based Myambutol.
  • Exclusive savings opportunities, including a Myambutol coupon code for additional discounts on your first order.
  • Fast and secure shipping, with most orders delivered within 3-5 business days via reliable postal services (Xpress Post).

At Polar Bear Meds, your prescription is filled through licensed pharmacy partners to ensure authenticity and safety. If you are seeking a trusted, affordable way to buy Myambutol online from Canada, Polar Bear Meds offers a convenient way to access your prescribed medication.

Important Disclaimer

Important Disclaimer

The medical content provided about Myambutol is for informational and educational purposes only and is not intended to replace professional medical advice, diagnosis, or treatment. Myambutol is a prescription-based medicine for tuberculosis and should be used only under the supervision of a healthcare professional. Always consult your doctor before changing or stopping your Myambutol dosage.

Frequently Asked Questions

Frequently Asked Questions

Dr. Jackson Miller

Medically Reviewed by Dr. Jackson Miller (M.D)

Dr. Jackson Miller is a board-certified medicine physician & hospitalist. He is a healthcare professional with a strong background in patient care. With years of experience and a patient-first approach, he believes the foundation of good health is a patient who feels informed and empowered. He contributes to medical content review, drawing on his background in clinical practice and patient education. He focuses on presenting health information in a clear, accurate, and accessible way to help readers make informed decisions. His work emphasizes clarity, evidence-based guidance, and understandable explanations of medical topics.

Find Dr. Jackson Miller on:LinkedIn

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