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Myambutol

Generic Name: Ethambutol (e THAM byoo tole)
Brand Name: Myambutol
Easy-to-read patient leaflet for Myambutol. Includes indications, proper use, special instructions, precautions, and possible side effects.
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Drug Information:
For all patients taking Myambutol (ethambutol): Children: This is not a list of all drugs or health problems that interact with Myambutol (ethambutol). Tell your doctor and pharmacist about all of your drugs (prescription or OTC, natural products, vitamins) and health problems. You must check to make sure that it is safe for you to take Myambutol (ethambutol) with all of your drugs and health problems. Do not start, stop, or change the dose of any drug without checking with your doctor. Use Myambutol (ethambutol) as ordered by your doctor. Read all information given to you. Follow all instructions closely. Learn more

Pickup / Home Delivery

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Myambutol Side Effects

Note: This document contains side effect information about ethambutol. Some of the dosage forms listed on this page may not apply to the brand name Myambutol.

For the Consumer

Applies to ethambutol: oral tablet

Along with its needed effects, ethambutol (the active ingredient contained in Myambutol) may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor immediately if any of the following side effects occur while taking ethambutol:

Less common

  • Chills
  • pain and swelling of joints, especially big toe, ankle, or knee
  • tense, hot skin over affected joints

Rare

  • Blurred vision, eye pain, red-green color blindness, or any loss of vision (more common with high doses)
  • fever
  • joint pain
  • numbness, tingling, burning pain, or weakness in hands or feet
  • skin rash

Some side effects of ethambutol may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

Less common

  • Abdominal pain
  • confusion
  • headache
  • loss of appetite
  • nausea and vomiting

For Healthcare Professionals

Applies to ethambutol: oral tablet

General

The most commonly reported side effects included decreased visual acuity and optic neuritis.

Ocular

Common (1% to 10%): Decreased visual acuity, optic neuritis

Uncommon (0.1% to 1%): Color blindness, eye pain, loss of vision, scotoma, visual disturbances

Frequency not reported: Irreversible blindness, optic neuropathy, retrobulbar neuritis

Nervous system

Uncommon (0.1% to 1%): Visual field defect

Rare (0.01% to 0.1%): Extremity paresthesia (extremity numbness/tingling), numbness, peripheral neuritis, peripheral neuropathy

Very rare (less than 0.01%): Dizziness, headache

Metabolic

Uncommon (0.1% to 1%): Hyperuricemia

Very rare (less than 0.01%): Gout

Frequency not reported: Anorexia, precipitation of acute gout

Dermatologic

Rare (0.01% to 0.1%): Pruritus, rash, Stevens-Johnson syndrome, toxic epidermal necrolysis, urticaria

Very rare (less than 0.01%): Bullous dermatitis, epidermal necrolysis, photosensitive lichenoid eruptions

Frequency not reported: Cutaneous reactions, dermatitis, erythema multiforme, exfoliative dermatitis

Hematologic

Rare (0.01% to 0.1%): Thrombocytopenia/reversible thrombocytopenia

Very rare (less than 0.01%): Leukopenia, neutropenia

Frequency not reported: Eosinophilia, lymphadenopathy

Hypersensitivity

Very rare (less than 0.01%): Anaphylactic reaction, anaphylactoid reactions, hypersensitivity, hypersensitivity syndrome

Psychiatric

Very rare (less than 0.01%): Disorientation, hallucinations, mental confusion

Respiratory

Very rare (less than 0.01%): Pneumonitis, pulmonary infiltrates with/without eosinophilia

Other

Very rare (less than 0.01%): Fever, malaise, pyrexia

Hepatic

Very rare (less than 0.01%): Hepatic failure

Frequency not reported: Abnormal liver function test values, hepatitis, jaundice, liver toxicity/fatal liver toxicity, transient impairment of liver function

Renal

Very rare (less than 0.01%): Interstitial nephritis

Musculoskeletal

Very rare (less than 0.01%): Joint pain

Gastrointestinal

Frequency not reported: Abdominal pain, diarrhea, gastrointestinal disorders, gastrointestinal upset, nausea, vomiting

Cardiovascular

Frequency not reported: Myocarditis, pericarditis

Editorial References and Review

Medically reviewed by USARx EDITORIAL TEAM Last updated on 1/1/2020.

Source: Drugs.com Myambutol (www.drugs.com/myambutol.html).