A good understanding of the usefulness and limitations of biological testing (eg of urine, blood, breath and oral fluid samples), can help managers and keyworkers to plan, review and optimise treatment for service users.

This briefing looks at testing’s role as an integral part of treatment. It can help keyworkers and services make best use of the most appropriate tests and use test results effectively to improve treatment and outcomes. The content is drawn from published evidence and guidance, and service provider feedback. (NB There are specific issues around confidentiality and information sharing, consent and capacity to give consent, and safeguarding for under-18s in relation to testing.)