Vaping is a serious concern in public health. Nurses are well-positioned to play a role in providing counseling and health promotion related to vaping if they have adequate knowledge and skills to do so. However, both a knowledge and curriculum gap have been identified in nursing education related to vaping and how to counsel patients about vaping issues. The purpose of this study was to evaluate the use of simulated patient scenarios to impact pre-baccalaureate student nurses' self-efficacy and intent to counsel patients about issues related to vaping. This study used a quasi-experimental, one group, pre-test, post-test design. Ninety-four nursing students were recruited using convenience sampling from a pre-baccalaureate nursing program at one university in the southwestern United States. The students watched an educational video made by the researcher with information about vaping and participated in a simulation intervention. Groups of six to 10 participants took a pre-test, participated in four simulated patient scenarios about counseling for vaping issues, and took a post-test. The dependent variables measured were self-efficacy and intent to counsel. The variables were tested using the paired samples t-test and Pearson's correlational coefficient. Results indicated the intervention was effective in increasing self-efficacy and intent to counsel. The variables were shown to have a strong relationship to each other both before and after the intervention. Additionally, the intervention was shown to strengthen the relationship between the variables. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction iohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com.bibliotheek.ehb.be/en-US/products/dissertations/individuals.shtml.]