Abstract
ObjectiveThe nocebo effect is the adverse effects of treatment that cannot be attributed to a medicine. We investigated if we could increase or decrease nocebo responding following medicine taking. A nocebo explanation to reduce side effects was compared with a negative medication news item designed to increase side effects and a control condition. Methods108 healthy participants enrolled in a between-subjects study purportedly testing the effect of lamotrigine (actually placebo) on mood and cognition. Participants were randomised to watch either a video explaining the nocebo effect; a negative media item on lamotrigine, or control video prior to receiving the tablet. Side effects were assessed at 45-min and 48-h. ResultsThe negative media group reported significantly more side effects (M = 0.78, SD = 1.53) than the control group (M = 0.46, SD = 1.80, p = .035) at the end of session and a greater proportion of the negative media group (33%) reported at least one side effect compared to the nocebo explanation (11%) and control group (11%, p = .020). The nocebo explanation group reported significantly fewer side effects (M = 0.38, SD = 1.16) than the control group (M = 1.37, SD = 2.98, p = .038) at the 48-h follow-up. ConclusionExplaining the nocebo effect may be a beneficial addition to standard medicine information for reducing side effect reporting. Negative media coverage about a drug is likely to generate increased side effects. Future research should examine the benefit of nocebo explanation in patients starting new medicines.
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