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Prescription Required
Formulation : Tablet
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Dosage: 100mg
Quantity: 100
Price: $47.40
Dosage: 400mg
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Prescription Required
Formulation : Tablet
Drug Name Dosage Quantity Price Buy Now
Ethambutol Hcl 400mg 100 $32.50 Add To Cart
Ethambutol Hcl
Dosage: 400mg
Quantity: 100
Price: $32.50


Myambutol is a medication that contains the active ingredient ethambutol and is primarily used in the treatment of tuberculosis (TB). Ethambutol is an antibiotic that works by stopping the growth of bacteria.

Myambutol is used in combination with other medications to treat tuberculosis.

Use and Dosage

Take this medication by mouth with or without food as directed by your doctor, usually once daily. This medication may sometimes be taken twice weekly. Take this medication exactly as directed by your doctor. The dosage is based on your age, weight, medical condition, and response to treatment.

If you also take antacids that contain aluminum, take this medication at least 4 hours before the antacid.

For the best effect, take this antibiotic at evenly spaced times. To help you remember, take this medication at the same time(s) every day.

Continue to take this medication (and other TB medications) until the full prescribed amount is finished, even if symptoms disappear. Stopping the medication too early or skipping doses may allow the bacteria to continue to grow, which may result in a return of the infection and cause the infection to be more difficult to treat (resistant).

Side Effects

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Ethambutol can cause serious vision problems, including vision loss that may be permanent. Stop using ethambutol and call your doctor at once if you have any problems with one or both of your eyes, such as:

  • Blurred vision or trouble focusing
  • Loss of vision in one eye that lasts an hour or longer
  • Increased sensitivity of your eyes to light
  • Loss of color vision
  • Pain with eye movement, pain behind your eyes

Serious side effects include:

  • New or worsening cough with fever, trouble breathing
  • Numbness or tingling in your hands or feet
  • Confusion or hallucinations
  • Fever, swollen glands, painful mouth sores, skin sores, cold or flu symptoms, or general ill feeling
  • Easy bruising or bleeding (nosebleeds, bleeding gums)
  • Chest pain or shortness of breath with mild exertion
  • Little or no urinating
  • Liver problems–upper stomach pain, dark urine, clay-colored stools, or jaundice (yellowing of the skin or eyes)
  • Severe skin reaction–fever, sore throat, swelling in your face or tongue, burning in your eyes, skin pain, followed by a red or purple skin rash that spreads (especially in the face or upper body) and causes blistering and peeling

Common side effects of ethambutol may include:

  • Itching or rash
  • Joint pain
  • Headache or dizziness
  • Nausea, vomiting, stomach pain, indigestion, or loss of appetite

This is not a complete list of side effects and others may occur.


  • Before taking ethambutol, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies.
  • This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
  • Before using this medication, tell your doctor or pharmacist your medical history, especially of: eye problems (such as optic neuritis, cataracts, and diabetic retinopathy), liver disease, kidney disease, and alcohol use.
  • Ethambutol may cause live bacterial vaccines (such as typhoid vaccine) to not work well. Tell your healthcare professional that you are using ethambutol before having any immunizations/vaccinations.
  • Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products).
  • Alcohol may increase the risk of liver disease. Avoid alcoholic beverages while using this medication.
  • During pregnancy, this medication should be used only when needed. Discuss the risks and benefits with your doctor.
  • This medication passes into breast milk but is unlikely to harm a nursing infant. Consult your doctor before breast-feeding. If you have HIV disease, do not breastfeed because breast milk can transmit HIV.

Forms and Strengths

Myambutol is available in the following forms and strengths:

  • Myambutol Tablet:
    • 100 mg
    • 400 mg
  • Ethambutol Tablet:
    • 400 mg


What happens if I miss a dose?

Take the missed dose as soon as you remember. Skip the missed dose if it is almost time for your next scheduled dose. Do not take extra medicine to make up for the missed dose.

What happens if I overdose?

Seek emergency medical attention.

What should I avoid while taking ethambutol?

Avoid taking an antacid containing aluminum hydroxide (Alternately, Maalox, Mi-Acid, Mylanta, Rulox) within 4 hours after you take ethambutol. Some antacids can make it harder for your body to absorb ethambutol.



Additional information

Brand Name:


Scientific Name:

Ethambutol, Ethambutol Hcl

Other Names:

Etibi, Mycobutol


100mg, 400mg

Quantities Available: