Ethambutol Disease Interactions
There are 4 disease interactions with ethambutol.
Ethambutol (applies to ethambutol) optic neuritis
Major Potential Hazard, High plausibility. Applicable conditions: Visual Defect/Disturbance
Ethambutol is contraindicated in patients with known optic neuritis unless clinical judgement determines that it may be used. Ethambutol can produce decreases in visual acuity which appear to be due to optic neuritis. This may be related to dose and duration of treatment, and is generally reversible when administration of the drug is discontinued promptly. However, irreversible blindness has been reported. Ethambutol should not be used in patients who are unable to identify and report visual side effects or changes in vision such as young children or unconscious patients. It should be administered cautiously and only after careful consideration of risks and benefits in patients with preexisting visual defects such as cataracts, diabetic retinopathy, or recurrent inflammatory conditions of the eye. Ophthalmologic testing of visual acuity, visual field, and color discrimination is required before and during treatment. However, visual changes may be difficult to evaluate in some cases, since they may be related to the underlying disease rather than the drug.
References
- Lees AW, Allan GW, Smith J, et al. (1971) "Toxicity from rifampicin plus isoniazid and rifampicin plus ethambutol therapy." Tubercle, 52, p. 182-90
- Polak BC, Leys M, van Lith GH (1985) "Blue-yellow colour vision changes as early symptoms of ethambutol oculotoxicity." Ophthalmology, 191, p. 223-6
- Chatterjee VK, Buchanan DR, Friedmann AI, Green M (1986) "Ocular toxicity following ethambutol in standard dosage." Br J Dis Chest, 80, p. 288-91
- Joubert PH, Strobele JG, Ogle CW, van der Merwe CA (1986) "Subclinical impairment of colour vision in patients receiving ethambutol." Br J Clin Pharmacol, 21, p. 213-6
- DeVita EG, Miao M, Sadun AA (1987) "Optic neuropathy in ethambutol-treated renal tuberculosis." J Clin Neuroophthalmol, 7, p. 77-83
- Jimenez-Lucho VE, del Busto R, Odel J (1987) "Isoniazid and ethambutol as a cause of optic neuropathy." Eur J Respir Dis, 71, p. 42-5
- Kahana LM (1987) "Toxic ocular effects of ethambutol." Can Med Assoc J, 137, p. 213-6
- Bandopadhya P, Dash RJ (1988) "Toxic ocular effects of ethambutol." Can Med Assoc J, 138, p. 493
- Schild HS, Fox BC (1991) "Rapid-onset reversible ocular toxicity from ethambutol therapy." Am J Med, 90, p. 404-6
- Smith JL (1987) "Should ethambutol be barred?" J Clin Neuroophthalmol, 7, p. 84-6
- (2002) "Product Information. Myambutol (ethambutol)." Lederle Laboratories
Ethambutol (applies to ethambutol) hepatic impairment
Moderate Potential Hazard, Moderate plausibility. Applicable conditions: Liver Disease
Liver toxicities including fatalities have been reported when using ethambutol. Caution is advised, especially if using in patients with hepatic impairment. Baseline and periodic assessment of hepatic function should be performed.
References
- (2002) "Product Information. Myambutol (ethambutol)." Lederle Laboratories
Ethambutol (applies to ethambutol) hyperuricemia
Moderate Potential Hazard, High plausibility. Applicable conditions: Gout
Ethambutol may commonly cause hyperuricemia, which has been reported in up to two-thirds of treated patients. Occasionally, it has led to joint arthralgias and gouty arthritis after 1 to 2 months of therapy. Serum uric acid levels should be monitored in patients with preexisting hyperuricemia or gout during ethambutol therapy, and appropriate measures (e.g., administration of uricosuric agents) taken to prevent the development or exacerbation of gout.
References
- Postlethwaite AE, Bartel AG, Kelley WN (1972) "Hyperuricemia due to ethambutol." N Engl J Med, 286, p. 761-2
- Khanna BK (1980) "Acute gouty arthritis following ethambutol therapy." Br J Dis Chest, 74, p. 409-10
- Narang RK, Agarwal MC, Raina AK, et al. (1983) "Hyperuricaemia induced by ethambutol." Br J Dis Chest, 77, p. 403-6
- Khanna BK, Gupta VP, Singh MP (1984) "Ethambutol-induced hyperuricaemia." Tubercle, 65, p. 195-9
- (2002) "Product Information. Myambutol (ethambutol)." Lederle Laboratories
Ethambutol (applies to ethambutol) renal dysfunction
Moderate Potential Hazard, High plausibility.
Ethambutol is primarily eliminated by the kidney. Patients with renal impairment may be at greater risk for adverse effects from ethambutol, including optic neuritis, due to decreased drug clearance. Therapy with ethambutol should be administered cautiously in patients with renal impairment. Dosage adjustments are recommended in moderate renal impairment but should be based on serum levels of ethambutol.
References
- Collier J, Joekes AM, Philalithis PE, Thompson FD (1976) "Two cases of ethambutol nephrotoxicity." Br Med J, 11/06/76, p. 1105-6
- Stone WJ, Waldron JA, Dixon JH, et al. (1976) "Acute diffuse interstitial nephritis related to chemotherapy of tuberculosis." Antimicrob Agents Chemother, 10, p. 164-72
- Garcia-Martin F, Mampaso F, de Arriba G, et al. (1991) "Acute interstitial nephritis induced by ethambutol." Nephron, 59, p. 679-80
- Varughese A, Brater DC, Benet LZ, Lee C-S (1986) "Ethambutol kinetics in patients with impaired renal function." Am Rev Respir Dis, 134, p. 34-8
- Insel J, Mirvis DM, Boland MJ, Cinquegrani MP, Shanes J, Rubin SA, Whalen JJ (1989) "A multicenter study of the safety and efficacy of benazepril hydrochloride, a long-acting angiotensin-converting enzyme inhibitor, in patients with chronic congestive heart failure." Clin Pharmacol Ther, 45, p. 312-20
- De Feo P, Torlone E, Perriello G, Fanelli C, Epifano L, Di Vincenzo A, Modarelli F, Motolese M, Brunetti P, Bolli GB (1992) "Short-term metabolic effects of the ACE-inhibitor benazepril in type 2 diabetes mellitus associated with arterial hypertension." Diabete Metab, 18, p. 283-8
- (2002) "Product Information. Myambutol (ethambutol)." Lederle Laboratories
Ethambutol drug interactions
There are 129 drug interactions with ethambutol.
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Drug Interaction Classification
Highly clinically significant. Avoid combinations; the risk of the interaction outweighs the benefit. | |
Moderately clinically significant. Usually avoid combinations; use it only under special circumstances. | |
Minimally clinically significant. Minimize risk; assess risk and consider an alternative drug, take steps to circumvent the interaction risk and/or institute a monitoring plan. | |
No interaction information available. |
Further information
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