Depression Clinical Trial
Official title:
WiserAD: A Randomised Trial of a Structured Online Intervention to Promote and Support Antidepressant Deprescribing in Primary Care.
The use of antidepressants (ADs) is increasing globally, including within Australia, which has one of the highest rates of AD prescribing. Despite clear benefits for many people, there is reason to believe that the ongoing use of these medications is often not properly monitored or stopped (deprescribed) when a person returns to better Mental health. This trial sets out to test how well an online support tool (WiserAD) can help patients and their general practitioner to manage the careful and appropriate reducing and stopping of antidepressants, in primary care patients.
Antidepressants (ADs) have significantly improved the health and wellbeing for very many people and their success in enabling those with depression to retain their quality of life has undoubtedly led to their widespread use around the globe. However, the success of ADs has also led to a significant and unnecessary clinical and economic burden on the healthcare system and patients, through over prescribing, most often in cases when they are no longer of therapeutic use. Such inappropriate medicine use (defined as use that is going against clinical guidelines) is a significant financial and clinical challenge for healthcare providers globally. Recent figures show that alongside the US, UK and parts of Northern Europe, Australia now has one of the world's highest AD prescribing rates with a total cost of over $200 million per year. In 2015-2016 alone there were more AD prescriptions than people: 24.72 million - up 20% since 2012. Significantly, much of this this is due to an excess of long term users rather than an increase in the number of people being newly diagnosed with major depressive disorder (MDD) or other disorders for which ADs are prescribed (e.g. anxiety). In a recent study by this group a cohort of almost 800 primary care patients with depressive symptoms showed that only 15% of long term users satisfied clinical criteria for long term AD use. There is relatively little research that explores the long term effects of AD use but there are indications that it can be harmful. In many cases, long term use can be linked to a range of severe side effects including increased risk of cardiovascular events, gastrointestinal bleeding and diabetes. Psychological dependence is another problem facing users and stems from a perceived need to take ADs for fear of a relapse. That fear, shared by doctors, explains why AD use is unnecessarily protracted, even though it may undermine patients' autonomy and resilience, becoming less likely to self-manage or willing to stop their AD medication. Crucially, the evidence for relapse comes primarily from studies on AD users for whom guidelines recommend continued treatment (those who meet diagnostic criteria for moderate to severe major depressive disorder and have been receiving AD treatment for less than 12 months). In those with milder symptoms epidemiological research suggests that long-term AD use does not increase the likelihood of relapse and that that inappropriate long-term AD users can safely cease their medication. These findings are supported by a randomised controlled trial of AD cessation for primary care patients without current depression which showed a much smaller difference in relapse than previously thought. Limiting AD use only to cases in which it is clinically indicated is in line with quality prescribing and will help to reduce costs and associated adverse events as well as the potential benefit of improving long-term mental health outcomes for patients. Although they are not addictive research has shown that ADs are more difficult to cease than other medications and previous studies have demonstrated limited success in deprescribing trials of antidepressants compared to other medications suggesting that a more intensive, patient-focused intervention is required to support successful de-prescribing. The WiserAD study will test whether a novel, structured approach to deprescribing antidepressants is more effective than usual practice in enabling GPs to help patients cease (or decrease) their AD medication whilst maintaining their mental health and wellbeing. ;
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