Eosinophilia-Myalgia Syndrome Treatment & Management
- Author: Thomas A Medsger Jr, MD; Chief Editor: Herbert S Diamond, MD more...
Medical Care
- Stopping ingestion of L-tryptophan or any other agent that may be the offending factor is key in the treatment of patients with eosinophilia-myalgia syndrome (EMS).
- Because of the protean manifestations of EMS, patients are treated based on their symptoms. No drug is known to alter the course of the disease. High doses of corticosteroids (eg, prednisone up to 60 mg/d) may be helpful in acutely ill patients, but the response is not nearly as dramatic as in patients with pure eosinophilic fasciitis.
- Assistance with activities of daily living in either the inpatient or outpatient setting may be required because the myalgia and muscle cramps can be incapacitating.
- Based on symptoms, patients may need hospital admission for evaluation and treatment.
Consultations
- Depending on the clinical features, consultation with a neurologist, rheumatologist, pulmonologist, or dermatologist may be needed. Consultation with a surgeon may be necessary for muscle, nerve, and fascial biopsies.
Diet
- Any over-the-counter medication or herbal supplement should be avoided until further information is available.
Activity
- Bed rest may be required for the intense muscle pain and cramps that occur during the acute phase of the illness.
- During the chronic phase of the disease, strenuous physical activity may cause muscle pain and cramps and should be avoided if these symptoms occur.
Hertzman PA, Clauw DJ, Duffy J, Medsger TA Jr, Feinstein AR. Rigorous new approach to constructing a gold standard for validating new diagnostic criteria, as exemplified by the eosinophilia-myalgia syndrome. Arch Intern Med. Oct 22 2001;161(19):2301-6. [Medline].
Martínez-Cabot A, Messeguer A. Generation of quinoneimine intermediates in the bioactivation of 3-(N-phenylamino)alanine (PAA) by human liver microsomes: a potential link between eosinophilia-myalgia syndrome and toxic oil syndrome. Chem Res Toxicol. Oct 2007;20(10):1556-62. [Medline].
Noakes R, Spelman L, Williamson R. Is the L-tryptophan metabolite quinolinic acid responsible for eosinophilic fasciitis?. Clin Exp Med. Jun 2006;6(2):60-4. [Medline].
Barth H, Klein R, Berg PA. L-tryptophan contaminant 'peak E' induces the release of IL-5 and IL-10 by peripheral blood mononuclear cells from patients with functional somatic syndromes. Clin Exp Immunol. Nov 2001;126(2):187-92. [Medline].
Allen JA, Peterson A, Sufit R, Hinchcliff ME, Mahoney JM, Wood TA, et al. Post-epidemic eosinophilia-myalgia syndrome associated with L-tryptophan. Arthritis Rheum. Nov 2011;63(11):3633-9. [Medline].
Rieber N, Belohradsky BH. AHR activation by tryptophan--pathogenic hallmark of Th17-mediated inflammation in eosinophilic fasciitis, eosinophilia-myalgia-syndrome and toxic oil syndrome?. Immunol Lett. Feb 16 2010;128(2):154-5. [Medline].
Okada S, Kamb ML, Pandey JP, Philen RM, Love LA, Miller FW. Immunogenetic risk and protective factors for the development of L-tryptophan-associated eosinophilia-myalgia syndrome and associated symptoms. Arthritis Rheum. Oct 15 2009;61(10):1305-11. [Medline]. [Full Text].
Smith MJ, Garrett RH. A heretofore undisclosed crux of eosinophilia-myalgia syndrome: compromised histamine degradation. Inflamm Res. Nov 2005;54(11):435-50. [Medline].
Swygert LA, Maes EF, Sewell LE, et al. Eosinophilia-myalgia syndrome. Results of national surveillance. JAMA. Oct 3 1990;264(13):1698-703. [Medline].
Silver RM. Pathophysiology of the eosinophilia-myalgia syndrome. J Rheumatol Suppl. Oct 1996;46:26-36. [Medline]. [Full Text].
Pincus T. Eosinophilia-myalgia syndrome: patient status 2-4 years after onset. J Rheumatol Suppl. Oct 1996;46:19-24; discussion 24-5. [Medline].
Belongia EA, Gleich GJ. The eosinophilia-myalgia syndrome revisited [editorial]. J Rheumatol. Oct 1996;23(10):1682-5. [Medline].
Bulpitt KJ, Verity MA, Clements PJ, Paulus HE. Association of L-tryptophan and an illness resembling eosinophilic fasciitis. Clinical and histopathologic findings in four patients with eosinophilia-myalgia syndrome. Arthritis Rheum. Jul 1990;33(7):918-29. [Medline].
Clauw DJ, Flockhart DA, Mullins W, et al. Eosinophilia-myalgia syndrome not associated with the ingestion of nutritional supplements. J Rheumatol. Dec 1994;21(12):2385-7. [Medline].
Clauw DJ, Pincus T. The eosinophilia-myalgia syndrome: what we know, what we think we know, and what we need to know. J Rheumatol Suppl. Oct 1996;46:2-6. [Medline].
Culpepper RC, Williams RG, Mease PJ, et al. Natural history of the eosinophilia-myalgia syndrome. Ann Intern Med. Sep 15 1991;115(6):437-42. [Medline].
Freundlich B. Eosinophilia-myalgia syndrome. In: Kelley WA, Harris ED, Ruddy S, Sledge CB, eds. Textbook of Rheumatology. 4th ed. Philadelphia, Pa: WB Saunders; 1993:1150-7.
Haseler LJ, Sibbitt WL Jr, Sibbitt RR, Hart BL. Neurologic, MR imaging, and MR spectroscopic findings in eosinophilia myalgia syndrome. AJNR Am J Neuroradiol. Oct 1998;19(9):1687-94. [Medline].
Hertzman PA. Criteria for the definition of the eosinophilia-myalgia syndrome. J Rheumatol Suppl. Oct 1996;46:7-12. [Medline].
Hertzman PA, Falk H, Kilbourne EM, et al. The eosinophilia-myalgia syndrome: the Los Alamos Conference. J Rheumatol. Jun 1991;18(6):867-73. [Medline].
Kilbourne EM, Swygert LA, Philen RM, et al. Interim guidance on the eosinophilia-myalgia syndrome. Ann Intern Med. Jan 15 1990;112(2):85-7. [Medline].
Lockshin MD. Which patients with antiphospholipid antibody should be treated and how?. Rheum Dis Clin North Am. Feb 1993;19(1):235-47. [Medline].
Margolin L. Non-L-tryptophan related eosinophilia-myalgia syndrome with hypoproteinemia and hypoalbuminemia. J Rheumatol. Mar 2003;30(3):628-9. [Medline].
Martin RW, Duffy J, Engel AG, et al. The clinical spectrum of the eosinophilia-myalgia syndrome associated with L-tryptophan ingestion. Clinical features in 20 patients and aspects of pathophysiology. Ann Intern Med. Jul 15 1990;113(2):124-34. [Medline].
Philen RM, Posada M. Toxic oil syndrome and eosinophilia-myalgia syndrome: May 8-10, 1991, World Health Organization meeting report. Semin Arthritis Rheum. Oct 1993;23(2):104-24. [Medline].

