Abstract
Nocebo refers to the adverse events (AEs) experienced when taking a placebo drug and is believed to be a centrally mediated process. We sought to examine the AEs following placebo administration in Randomised Controlled Trials (RCTs) for Myasthenia Gravis (MG) patients. A systematic literature search was performed on Medline and Web of Science for RCTs for MG pharmacological treatments. We assessed the number of placebo-treated patients reporting at least one AE and the number of dropouts because of AEs. Data were extracted from six RCTs fulfilling the search criteria. Four out of five placebo-treated participants (80.1%) reported at least one AE and one in 40 (2.4%) discontinued placebo treatment because of AE. All patients participating in the MG trials reported similar AEs independent of the study arm to which they belonged (placebo or active treatment). This meta-analysis demonstrates a low nocebo dropout rate in MG compared to central nervous system disorders.
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