The objective of this study is to examine the impact of digital marketing strategies on product promotion, with an emphasis on the role of influential advertising in the Iranian pharmaceutical industry. Given the expansion of digital technologies and the transformation of customer communication patterns, pharmaceutical companies are increasingly compelled to utilize modern marketing tools to enhance the effectiveness of their promotional activities. This research is applied in terms of purpose and employs a descriptive–survey methodology. The statistical population consists of managers and employees of Omid Darou Salamat Pharmaceutical Company, and the data were collected using a researcher-developed questionnaire based on a five-point Likert scale. Data analysis was conducted using structural equation modeling and statistical software. The findings indicate that digital marketing strategies, including social media advertising, content marketing, email marketing, and pay-per-click advertising, have a significant impact on product promotion. Moreover, influential advertising, as a key variable, plays an effective mediating role in enhancing product awareness, stimulating purchase intention, and improving purchasing performance. The results suggest that the targeted use of digital tools can lead to increased effectiveness of marketing activities and enhance the competitive position of pharmaceutical companies. Based on the findings, it is recommended that managers in the pharmaceutical industry focus on designing effective advertising messages, leveraging digital media, and adhering to ethical principles in advertising in order to improve product promotion and increase consumer trust.