Table 1. Review search terms and databases reviewed.

Database	Search terms
PubMed	((((((therapeutic adherence) OR (medication compliance)) OR (medication adherence)) OR (treatment adherence))) AND ((((((friend support) OR (peer support)) OR (family involvement)) OR (family engagement)) OR (family support)) OR (social support))) AND (hypertension)
CINAHL with full text	((social support OR (family support or family involvement or family engagement) OR peer support) AND (medication adherence OR medication compliance OR therapeutic adherence OR treatment adherence) AND hypertension
Embase	(therapeutic AND adherence OR (medication AND adherence) OR ’medication compliance’ OR (treatment AND adherence) AND (peer AND support OR (social AND support) OR ’family support’ OR (friend AND support) AND hypertension
PsycINFO	(((social support) OR (family social support) OR (friend support) OR (peer support)) AND (hypertension) AND (((medication AND adherence) OR (therapeutic adherence AND compliance))