Examination of Clinical Trial Costs and Barriers for Drug Development. E.3.2 Lengthy Timelines


  • According to one study, the average length of time from the start of clinical testing to marketing is 90.3 months (7.5 years).
  • Longer timelines increase costs and decrease revenues.
  • Longer studies are needed to see if any safety issues arise when drugs are taken long-term to manage chronic diseases.
  • The “one-off” nature of trial organization protracts trial initiation timeframes.
  • The clinical trial business model has not kept pace with potential for efficiency gains through technological advances or centralized coordination.

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