Satisfaction, Preference and Injection Habits of Switching to 200 Units/ml Insulin Lispro Pen from 100 Units/ml: A Patient Survey in Germany.

Introduction: The study was designed to assess patient satisfaction, preferences and injection habits for patients using insulin lispro 200 units/ml pen (IL200) compared to their previously used disposable 100 units/ml mealtime insulin pen ("MTI-100 pen") in Germany.

Methods: A site-based, cross-sectional study involving a self-reported survey and medical record extraction in patients with diabetes currently using IL200 for between 3 and 12 months and had previously used any disposable MTI-100 pen.

Results: Of 114 patients included, 83.3% were satisfied with IL200 and 3.5% were dissatisfied; 70.2% preferred IL200 over their previous MTI-100 pen and 4.4% preferred their previous MTI-100 pen. The main reasons for IL200 preference were the amount of insulin the pen carries, longer use before discarding, number of non-empty pens discarded, injection volume and frequency replacing pens. Patients discarded (median) 4 IL200 pens per month with 5.3% discarding more than 10 units in their last pen. When insufficient insulin remained to complete a dose, 74.6% injected the remainder and completed with a new pen, 19.3% discarded the pen with remaining insulin, 7.0% saved it for future use and 1.8% left the dose incomplete.

Conclusions: Satisfaction and preference for IL200 was high in this sample of patients using IL200 for 3-12 months. Reasons were consistent with IL200 features, explaining the better patient experience and potential resource saving transitioning from a disposable MTI-100 pen.