The clinical and cost-effectiveness of collaborative care for improving outcomes in people with mental and physical comorbidities is well established. However, translating these models into enduring change in routine care has proved difficult. In this editorial we outline how to shift the conversation on collaborative care from ‘what are we supposed to do?’ to ‘how we can do this’.

Intellectual disability (also known as learning disability in UK health services) and autism are distinct from the serious mental illnesses for which the Mental Health Act is designed to be used. Their inclusion in the definition of mental disorder is discriminatory, resulting in unjust deprivations of liberty. Intellectual disability and autism should be excluded from the Mental Health Act.

Repetitive transcranial magnetic stimulation (rTMS) has been investigated as treatment for major depressive episodes since the early 1990s. Using data from a recent meta-analysis, we show that most patients included in randomised trials display relatively high degrees of treatment resistance. This might have unfavourably biased the clinical reputation of rTMS.

The lives of Children and Adolescents with PaRental mental Illness (CAPRI) represent a public health priority. Identifying those at most risk within the risk subset is crucial to promote resilience for this group. The ability to develop child-centred interventions will underpin the success of evidence-based services and CAPRI themselves are key to unlocking current service barriers.

Sarcosine, which is freely sold as a dietary supplement, has pharmacological activity to boost functioning of the glutamatergic N-methyl-d-aspartate receptor (NMDAR) and hence it is a biologically rational treatment for schizophrenia. The small number of studies carried out to date provide some evidence for its efficacy and psychiatrists could consider suggesting its use to their patients.

We present an account of why we decided to retract a paper. We discovered a lack of adherence to conventional trials registration, execution, interpretation and reporting, and consequently, with the authors, needed to correct the scientific record. We set out our responses in general to strengthen research integrity.

Ketamine therapy for treatment-resistant depression in European national health systems may only be considered after attempting all evidence-based antidepressant strategies outlined in clinical guidelines. This paper seeks to explain the ethical, regulatory and procedural framework for the off-label use of ketamine for treatment-resistant depression within a public healthcare system.

Evolutionary science can serve as the high-level organising principle for understanding psychiatry. Evolutionary concepts generate new models and ideas for future psychiatric study, research, policy and therapy. The authors accordingly make the case for the inclusion of evolutionary biology in the postgraduate education of psychiatric trainees.

Social interactions are fundamental for human development, and disordered social interactions are pervasive in many psychiatric disorders. Recent advances in ‘two-person neuroscience’ have provided new tools for characterising social interactions. Accordingly, interaction-based ‘sociometrics’ hold great promise for developmental psychology and psychiatry, particularly in the early identification of social disorders.

Sodium valproate and related preparations have recently undergone regulatory review following concern about effects on the unborn child and doctors' failure to communicate risk. The issues are wider. Valproate is overused in psychiatry based on the false perception that ‘ease’ of use equates to better safety than alternatives. Valproic acid can disrupt fundamental physiological processes, the consequences of which are poorly understood and little discussed in the psychiatric literature. Valproate may be useful in a small number of patients with bipolar disorder but current prescribing patterns are unjustified. Perception needs to change.

Schizophrenia and bipolar disorder are genetically related and their clinical features overlap. Schizophrenia is conceptualised as a neurodevelopmental disorder but the evidence for bipolar disorder is less clear. Cluster-analytic approaches reveal different cognitive profiles within bipolar disorder, possibly reflective of differing neurodevelopmental loads, which are also suggested by recent genetic and neuroimaging studies. Such studies suggest the potential utility of further clinical subcategories in bipolar disorder based on neurodevelopmental load.

Mental health professionals form an important component of the response teams currently working in the Democratic Republic of the Congo to treat what is historically the second-largest Ebola outbreak. They provide psychological treatment to patients under extraordinary conditions, helping them cope with anxiety and the daily death of other patients.

Early intervention in psychosis has generated hope. Cost-effectiveness studies, to determine whether benefits exceed costs, thus far conclude only that early intervention ‘might be’ worth its costs. It is a testament to the importance of the question: even in the absence of conclusive data, a synthesis should be attempted.