As a part-time pharmaceutical sales representative, your duties involve marketing medicines to physicians, pharmacists, and healthcare providers. As a part-time employee or contractor, you work fewer than 40 hours per week. Many sales jobs have flexible schedules with hours that vary depending on leads, customer interest, and progress towards sales goals or benchmarks. Most sales reps operate within a specific geographic territory, promoting products to potential and existing customers. Your responsibilities may also include representing your company at trade shows and events.