Ethambutol

Author: Prof. Dr. med. Peter Altmeyer

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Last updated on: 29.10.2020

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Synonym(s)

EMB

Definition
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Half-life
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4–5 h

Pharmacodynamics (Effect)
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Inhibition of ribosomal RNA synthesis.

Indication
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Combination therapy of tuberculosis and therapy-resistant infections caused by atypical mycobacteria.

Limited indication
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Restricted kidney function.

Dosage and method of use
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20 mg/kg bw/day p.o. or i.v., no administration to children.

Notice! During pregnancy administration in combination with isoniazid and rifampicin is possible.

Standard concentration
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1-5 ml of a 10% solution for instillation for tuberculous pleuritis.

Undesirable effects
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  • Cutaneous ADRs: Pruritus, maculopapular exanthema, toxic epidermal necrolysis, among others.
  • Extracutaneous ADRs: fever, retrobulbar neuritis with visual impairment and disturbance of red-green vision, hyperuricemia, arthralgias, peripheral neuropathy.

Notice! Regular ophthalmological check-ups are necessary before and during therapy.

Interactions
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Delayed absorption of EMB by antacids, cancellation of EMB effect by magnesium, disulfiram increases the risk of N. opticus neuritis

Contraindication
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Pre-damage of the optic nerve.

Preparations
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EMB-Fatol, Myambutol

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Last updated on: 29.10.2020