Definition, assessment and rate of psychotherapy side effects.

Abstract

Psychotherapy is often seen as a first line treatment, because patients and therapists consider this mode of treatment harmless in comparison, for instance, to drug treatment. This assumption is supported by the fact that there are only limited scientific reports on psychotherapy side effects (1,2). There is, however, some evidence which suggests that psychotherapy can have frequent or serious negative consequences, like all effective treatments (3–5). There are several reasons why awareness of psychotherapy side effects is limited and research on this issue is insufficient. First, the psychotherapist is the “producer” of treatment and therefore responsible, if not liable, for all negative effects, which results in a perceptional bias towards positive rather than negative effects (6). Second, psychotherapy does not only focus on symptoms but also on social behavior, so that the spectrum of possible negative effects is much broader than in pharmacotherapy (7). Third, there is even no consensus on what to call negative: for instance, when evaluating a manuscript on psychotherapy side effects, a reviewer wrote: “a divorce can be both positive and negative, and crying in therapy can reflect a painful experience but can also be a positive and therapeutic event”. Fourth, there is a lack of differentiation between side effects and therapy failure or deterioration of illness (8). Fifth, there are no generally accepted instruments for the assessment of psychotherapy side effects and no rules on how to plan scientific studies or monitor side effects in randomized controlled clinical trials (2).