Summarises the findings of a rapid appraisal of available evidence on the effectiveness of social prescribing. Social prescribing is a way of linking patients in primary care with sources of support within the community, and can be used to improve health and wellbeing. For the review searches were conducted on the databases: DARE, Cochrane Database of Systematic Reviews and NHS EED for relevant systematic reviews and economic evaluations. Additional searches were also carried out on MEDLINE, ASSIA, Social Policy and Practice, NICE, SCIE and NHS. Very little good quality evidence was identified. Most available evidence described evaluations of pilot projects but failed to provide sufficient detail to judge either success or value for money. The briefing calls for better evaluation of new schemes. It recommends that evaluation should be of a comparative design; examine for whom and how well a scheme works; the effect it has and its costs.