In clinical trials, which phase primarily tests safety in healthy volunteers?

In clinical trials, which phase primarily tests safety in healthy volunteers?

• A. Phase 2 clinical trials
• B. Post-Marketing Surveillance
• C. Phase 1 clinical trials
• D. NDA

Answer: (C)

The main idea here is that early human testing centers on safety and how the drug behaves in the body. Phase 1 trials are designed to assess safety, tolerability, and pharmacokinetics, and they are typically conducted in healthy volunteers. This stage uses small numbers of people and often involves dose-escalation steps to identify the safe starting dose and observe any adverse effects, which lays the groundwork for later studies in patients. Later phases shift focus toward efficacy and continued safety in people with the condition, while post-marketing surveillance tracks safety in the general population after approval. An NDA is simply the regulatory filing to obtain approval, not a trial phase.

The main idea here is that early human testing centers on safety and how the drug behaves in the body. Phase 1 trials are designed to assess safety, tolerability, and pharmacokinetics, and they are typically conducted in healthy volunteers. This stage uses small numbers of people and often involves dose-escalation steps to identify the safe starting dose and observe any adverse effects, which lays the groundwork for later studies in patients. Later phases shift focus toward efficacy and continued safety in people with the condition, while post-marketing surveillance tracks safety in the general population after approval. An NDA is simply the regulatory filing to obtain approval, not a trial phase.