This document provides guidance on how to convert doctors to prescribe pharmaceutical brands and maintain their loyalty over time. The key points are: 1) Conversion means getting doctors to continuously prescribe a brand on a daily basis. Developing relationships and understanding doctors' needs are important to conversion. 2) Different types of conversion include brand conversion and molecule conversion. Creating value for both the doctor and company helps convince doctors to prescribe a brand. 3) Demanding prescriptions assertively based on accurate prescription data can help maintain a doctor as a loyal prescriber in a win-win manner over the long run. 4) Perseverance through regular visits, effective product detailing, and addressing any issues the doctor