Aim: The aim of the study is to analyze the marketing strategies adopted by Alkem Laboratories for brand building of PAN-D antacid tablet in the gastrointestinal segment and to understand the role of medical representatives, doctors, and pharmacists in influencing brand perception and prescription behavior. Methodology: The study is based on both primary and secondary data. Primary data were collected from 120 respondents in Pune, including doctors, pharmacists, and medical representatives, using structured questionnaires and personal interviews. Secondary data were obtained from company reports, journals, websites, and published research. The collected data were ana lyzed using percentage analysis to identify key factors influencing brand building and prescription loyalty. Results: The findings of the study indicate that regular visits by medical representatives (96%), Continuing Medical Education (CME) programs (84%), and availability of clinical evidence (83%) play a major role in strengthening PAN-D’s brand image among doctors. Pharmacists’ stocking decisions are largely influenced by doctor demand (80%) and company reputation (60%). The study also identifies challenges such as price competition, limited promotional budgets, and intense market competition as significant barriers to the adoption of new pharmaceutical brands. Conclusion: The study concludes that Alkem Laboratories has successfully built a strong brand image for PAN-D through consistent field engagement, effective medical representative interactions, and ethical, science-based promotion. Continuous doctor education, strong company reputation, and relationship marketing have significantly contributed to sustained prescription loyalty. In a highly competitive pharmaceutical market, maintaining ethical promotion practices and scientific validation remains essential for long-term brand leadership.