Halfway through 2024, most ongoing clinical trials are focused on drug-related interventions, followed by biological interventions at 12%. Drug trials test new medications, compare different doses or combinations of existing drugs, whereas biological-related interventions, such as vaccines, are derived from living organisms. Clinical staff, facility requirements and necessary lab equipment often differ depending on the trial type and the intervention being studied.
After successfully completing discovery and design, followed by preclinical studies, the drug then enters Phase 1 of a clinical trial, where it is evaluated for safety and dosages.
In Phase 2, the intervention is evaluated for efficacy and side effects, which can necessitate hundreds of patients.
Phase 3 clinical trials are typically the most expensive, have the longest duration, and may require several thousand participants.
Pending FDA approval, sponsors can design clinical trials that combine two phases to streamline drug development and reduce time and resources needed.