Objectives. In a published study by Park and Shrewsbury 1 , compounding confidence was reported to be 70% when students had access to a compounding textbook, online video library and question test bank, FormulationRecords, graded Compounding Records from previous compounds, and in-laboratory teaching assistants. The study raised the question, "Is 70% the maximum limit of a student's compounding confidence, or would an additional resource or experience result in a higher confidence level?" This current study was designed to determine if self-analysis of their nonsterile preparation's potency was that resource or experience that would increase student confidence.Methods. Self-efficacy surveys were given to P1 and P3 students at the beginning and the end of a semester in which they completed their regularly scheduled compounding course. The survey assessed their confidence in general compounding skills and their perception that an added self-analytical component to determine the potency of their nonsterile preparations would improve their confidence level score.Results. P1 and P3 students reported increased confidence in all surveyed areas at the end of the semester, with P1 students showing more dramatic increases most likely due to this being their first compounding experience in this academic institution. P1 students reported a modest but significant decrease in their perception that potency self-analysis would impact their compounding ability (9.38 (1.12) to 8.98 (1.18)) while P3 students had a However, no statistical differences were found. Conclusions.The data showed that self-analysis of nonsterile preparations did increase student confidence to approximately 85% in this group of students. This indicates that a self-analysis component included in a compounding laboratory experience would be is beneficial in increasing student confidence in compounding skill and nonsterile preparation quality assessment.