• Active tuberculosis or other mycobacterial diseases (in combination with ≥1 other drug).

Contraindicated in:

• Hypersensitivity
• Optic neuritis.

Use Cautiously in:

• Renal impairment (dose ↓ required)
• Severe hepatic impairment (dose ↓ required)
• OB: Although safety not established, ethambutol has been used with isoniazid in pregnant women without fetal adverse effects
• Lactation: Use while breastfeeding only if potential maternal benefit justifies potential risk to infant.

EENT: optic neuritis.

GI: abdominal pain, anorexia, HEPATITIS, nausea, vomiting.

Metab: hyperuricemia.

MS: joint pain.

Neuro: confusion, dizziness, hallucinations, headache, malaise, peripheral neuritis.

Resp: pulmonary infiltrates.

Misc: anaphylactoid reactions, fever.

Drug-Drug:

• Neurotoxicity may be ↑ with other neurotoxic agents.
• Aluminum hydroxide may ↓ absorption (space doses 4 hr apart).

(Generic available)

• Tablets: 100 mg; 400 mg;

• PO (Adults and Children >13 yr): 15–25 mg/kg/day (max = 2.5 g/day) or 50 mg/kg (up to 2.5 g) twice weekly or 25–30 mg/kg (up to 2.5 g) 3 times weekly.
• PO (Children 1 mo–13 yr): HIV negative: 15–20 mg/kg/day once daily (max = 1 g/day) or 50 mg/kg/dose twice weekly (max = 2.5 g/dose); HIV-exposed/-infected: 15–25 mg/kg/day once daily (max = 2.5 g/day); MAC, secondary prophylaxis, or treatment in HIV-exposed/-infected: 15–25 mg/kg/day once daily (max = 2.5 g/day) with clarithromycin (or azithromycin) with or without rifabutin; Nontuberculous mycobacterial infection: 15–25 mg/kg/day once daily (max = 2.5 g/day).

Myambutol

• Inhibits the growth of mycobacteria.

• Tuberculostatic effect against susceptible organisms.

Therapeutic Classification: antituberculars

Absorption: Rapidly and well absorbed (80%) from the GI tract.

Distribution: Widely distributed; crosses blood-brain barrier in small amounts.

Metabolism/Excretion: 50% metabolized by the liver, 50% eliminated unchanged by the kidneys.

Half-life: 3.3 hr (↑ in renal or hepatic impairment).

Etibi

(plasma concentrations)

• Instruct patient to take medication as directed. Take missed doses as soon as possible unless almost time for next dose; do not double up on missed doses. A full course of therapy may take mo to yr. Do not discontinue without consulting health care professional, even though symptoms may disappear.
• Instruct patient to notify health care professional if no improvement is seen in 2–3 wk. Health care professional should also be notified if unexpected weight gain or decreased urine output occurs.
• Emphasize the importance of routine exams to evaluate progress and ophthalmic examinations if signs of optic neuritis occur.
• Rep: Advise females of reproductive potential to notify health care professional if pregnancy is planned or suspected or if breastfeeding.

e-THAM-byoo-tole

NDC Code^*

• 0555- Teva Pharmaceuticals USA, Inc.
  • 0555-0923- Ethambutol Hydrochloride
    • 0555-0923-02- 100 TABLET, FILM COATED in 1 BOTTLE (0555-0923-02)

• 50090- A-S Medication Solutions
  • 50090-0417- Myambutol
    • 50090-0417-2- 98 TABLET, FILM COATED in 1 BOTTLE (50090-0417-2)

• 50090- A-S Medication Solutions
  • 50090-2399- Ethambutol Hydrochloride
    • 50090-2399-0- 100 TABLET, FILM COATED in 1 BOTTLE (50090-2399-0)

• 50090- A-S Medication Solutions
  • 50090-2607- Myambutol
    • 50090-2607-0- 100 TABLET, FILM COATED in 1 BOTTLE (50090-2607-0)

• 50090- A-S Medication Solutions
  • 50090-3948- Ethambutol Hydrochloride
    • 50090-3948-0- 100 TABLET, FILM COATED in 1 BOTTLE, PLASTIC (50090-3948-0)

• 54879- STI Pharma LLC
  • 54879-001- Ethambutol Hydrochloride
    • 54879-001-01- 12 CARTON in 1 BOX (54879-001-01) > 12 BOTTLE in 1 CARTON > 100 TABLET, FILM COATED in 1 BOTTLE

• 54879- STI Pharma LLC
  • 54879-002- Ethambutol Hydrochloride
    • 54879-002-01- 12 CARTON in 1 BOX (54879-002-01) > 12 BOTTLE in 1 CARTON > 100 TABLET, FILM COATED in 1 BOTTLE

• 61748- VersaPharm Inc. - An Akorn Company
  • 61748-011- Ethambutol Hydrochloride
    • 61748-011-01- 100 TABLET, FILM COATED in 1 BOTTLE, PLASTIC (61748-011-01)

• 61748- VersaPharm Inc. - An Akorn Company
  • 61748-014- Ethambutol Hydrochloride
    • 61748-014-01- 100 TABLET, FILM COATED in 1 BOTTLE, PLASTIC (61748-014-01)

• 61748- VersaPharm Inc. - An Akorn Company
  • 61748-014- Ethambutol Hydrochloride
    • 61748-014-06- 60 TABLET, FILM COATED in 1 BOTTLE, PLASTIC (61748-014-06)

• 61748- VersaPharm Inc. - An Akorn Company
  • 61748-014- Ethambutol Hydrochloride
    • 61748-014-09- 90 TABLET, FILM COATED in 1 BOTTLE, PLASTIC (61748-014-09)

• 61748- VersaPharm Inc. - An Akorn Company
  • 61748-014- Ethambutol Hydrochloride
    • 61748-014-10- 1000 TABLET, FILM COATED in 1 BOTTLE, PLASTIC (61748-014-10)

• 61748- VersaPharm Inc. - An Akorn Company
  • 61748-014- Ethambutol Hydrochloride
    • 61748-014-11- 10 BLISTER PACK in 1 CARTON (61748-014-11) > 10 TABLET, FILM COATED in 1 BLISTER PACK

• 68084- American Health Packaging
  • 68084-280- Ethambutol Hydrochloride
    • 68084-280-01- 100 BLISTER PACK in 1 BOX, UNIT-DOSE (68084-280-01) > 1 TABLET in 1 BLISTER PACK (68084-280-11)

• 68180- Lupin Pharmaceuticals, Inc.
  • 68180-280- Ethambutol Hydrochloride
    • 68180-280-01- 100 TABLET in 1 BOTTLE (68180-280-01)

• 68180- Lupin Pharmaceuticals, Inc.
  • 68180-281- Ethambutol Hydrochloride
    • 68180-281-01- 100 TABLET in 1 BOTTLE (68180-281-01)

• 68180- Lupin Pharmaceuticals, Inc.
  • 68180-281- Ethambutol Hydrochloride
    • 68180-281-02- 500 TABLET in 1 BOTTLE (68180-281-02)

• 68180- Lupin Pharmaceuticals, Inc.
  • 68180-281- Ethambutol Hydrochloride
    • 68180-281-13- 4 BLISTER PACK in 1 CARTON (68180-281-13) > 14 TABLET in 1 BLISTER PACK (68180-281-11)

• 68850- STI Pharma, LLC
  • 68850-010- Myambutol
    • 68850-010-01- 100 TABLET, FILM COATED in 1 BOTTLE (68850-010-01)

• 68850- STI Pharma, LLC
  • 68850-012- Myambutol
    • 68850-012-01- 100 TABLET, FILM COATED in 1 BOTTLE (68850-012-01)

• 68850- STI Pharma, LLC
  • 68850-012- Myambutol
    • 68850-012-02- 10 BLISTER PACK in 1 BOX, UNIT-DOSE (68850-012-02) > 10 TABLET, FILM COATED in 1 BLISTER PACK

• 70518- REMEDYREPACK INC.
  • 70518-0459- Ethambutol Hydrochloride
    • 70518-0459-0- 30 TABLET, FILM COATED in 1 BLISTER PACK (70518-0459-0)

• 70518- REMEDYREPACK INC.
  • 70518-0751- Ethambutol Hydrochloride
    • 70518-0751-0- 30 TABLET, FILM COATED in 1 BLISTER PACK (70518-0751-0)