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Methotrexate (MTX) is the medication most commonly used for antirheumatic treatment in juvenile idiopathic arthritis. It has high efficacy, is usually well tolerated and has an excellent safety profile. However, intolerance symptoms frequently develop, which manifest as nausea, feelings of disgust, or abdominal complaints prior to or directly after application of the medication. A direct side effect can usually be easily excluded; however, the symptoms are limited to treatment with MTX. This MTX intolerance causes a significant reduction in the quality of life of affected patients, frequently puts the treating physician in an uncomfortable situation, and not uncommonly results in discontinuation of treatment. Conventional countermeasures such as antiemetics, change of route from subcutaneous to oral or vice versa, or, for example, taste masking, usually have only limited effect. Newer behavioral treatment strategies raise hopes of more effective symptom control. |
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