With the advancement of modern medical technology, the public now has quicker access to medications. Among these advancements, drug identification applications provide more accurate drug information to the public and healthcare providers. The COVID-19 pandemic has further accelerated their usage. Nevertheless, medication errors remain a frequent cause of medical incidents. Previous studies on drug identification systems have primarily focused on professional medical contexts, with limited attention given to their use in the daily lives of the general public. Therefore, this study aims to: (1) evaluate how users with varying medication frequencies utilize drug identification applications; (2) examine the impact of pill information visualization on these application interfaces; and (3) investigate how users identify pill information based on the appearance or textual attributes of pill. The study employed simulated experiments with participants categorized as high-experience and low-experience medication users, who completed surveys for analysis. Following task completion, semi-structured interviews were conducted. The results indicate that high-experience medication users significantly improved their understanding of drugs through the current pill identification systems. However, low-experience users faced excessive information overload, making it difficult to quickly absorb specialized pill knowledge. Regarding pill information, low-experience users relied more heavily on pill images, whereas high-experience users placed greater emphasis on technical terms and professional information. Both technical terms and pill appearance are critical components of pill identification systems. Thus, designing systems that deliver visually improved interfaces to facilitate quick comprehension for both high- and low-experience users is an essential consideration for future development.