Which phase of clinical trials is typically the most expensive and time-consuming in medical product development?

The journey from laboratory discovery to pharmacy shelf is long and complex for medical products. This trivia question focuses on a critical milestone in pharmaceutical product development that significantly impacts both safety and market viability. Test your knowledge of the regulatory pathway that shapes the medicines we rely on!

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Phase I (Safety testing with small groups of healthy volunteers)
Phase II (Initial efficacy testing with patients having the target condition)
Phase III (Large-scale efficacy testing with thousands of patients)
Phase IV (Post-market surveillance after product approval)