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BACKGROUND: With a healthcare system burdened by symptomatic and mental-health related conditions, the placebo effect may represent a useful clinical tool. First, however, there is a need to broaden research attention and investigate placebo effects outside laboratories and beyond experimental pain. This study investigated the effectiveness of a take-home placebo treatment in the short-term alleviation of stress, anxiety and symptoms of depression in a non-patient population. METHOD: A sample of 77 participants was randomized to either the 'oxytocin' treatment group (n = 22), the 'serotonin' treatment group (n = 22) or the wait-list control group (n = 33). The two treatment groups were given an 'anti-stress treatment spray' (placebo) to self-administer for 3 days, and completed online measures of perceived stress (Perceived Stress Scale-10), anxiety (Cognitive Somatic Anxiety Questionnaire) and symptoms of depression (Centre for Epidemiological Studies - Depression) before and after the 3-day protocol. RESULTS: Both the 'serotonin' and 'oxytocin' treatment sprays were effective in reducing symptoms of depression; however, only those in the 'oxytocin' group reported less stress and anxiety as compared with controls. Overall, the 'oxytocin' was perceived as more effective. CONCLUSION: Placebo effects can be translated to a real-life setting in the short-term reduction of stress, anxiety and symptoms of depression in a non-patient population. In treating psychological distress, placebos may be useful addition to the treatment repertoire. The information given with treatment may also be an important consideration for practitioners.
Darragh et al. (Thu,) studied this question.