Pharmacology and therapeutics are essential components of educational programmes in prescribing, yet little is known about students' experiences in studying these subjects for a prescribing role.To investigate the views and experiences of nurses as postgraduate students who were studying pharmacology and therapeutics in preparation for a prescribing role.Qualitative study using a multiple case narrative approach.The participants were undertaking or had recently completed a Master's degree programme; they worked in a range of clinical areas and services in the Auckland region.Twenty nurses, with advanced clinical backgrounds and experience engaged in postgraduate studies in pharmacology and therapeutics.A semi-structured interview of approximately 1h was undertaken with each participant. Transcripts were analysed within and across cases using Narralizer® software to support thematic analysis.There were four broad thematic areas. In the first, ‘prescribing in the context of advanced nursing practice’, participants reflected on why prescribing authority was important to them. In the second theme, ‘adequacy of prior pharmacology knowledge’ they discussed the relative lack of pharmacology in their undergraduate programmes and in nursing practice. In the third, ‘drawing on clinical experience in acquiring pharmacology knowledge’, participants discussed how, as they grappled with new pharmacological science, they drew on clinical experience which facilitated their learning. In the fourth theme, ‘benefits of increased pharmacology knowledge’ they discussed how their studies improved their interactions with patients, medical colleagues and as members of multi-disciplinary teams.All nurses viewed their studies in pharmacology as fundamental to their roles as prescribers, through knowledge development and an increase in confidence. Although pharmacology theory was new to many participants, their learning was facilitated because they were able to reflect on previous clinical experience and apply this to theory.