New treatments don’t move from the lab to your local pharmacy overnight. Before a medication, vaccine, device, or other medical product becomes widely available, researchers study it through a careful process. Clinical trials help doctors and scientists learn whether something works, what dose may be appropriate, and what side effects people should know about.
If you’re new to research, it can help to understand where clinical trials fit in the bigger picture.
You can also visit Tekton’s full guide to how clinical trials work or browse current opportunities on our Find a Study page.
What Researchers Are Trying to Learn
Researchers use these studies to figure out:
- Does this medication work?
- How should it be given?
- What’s the right dose?
- Are there side effects people should know about?
- Is it safe for long-term use?
The U.S. Food and Drug Administration (FDA) reviews data at every stage before a treatment can move forward.
Early Research (Discovery & Preclinical)
Before a treatment is studied in people, researchers first gather information in the lab.
This early work may include computer modeling, lab testing, cell-based research, and other methods. In some cases, animal studies may still be part of preclinical research. The FDA has also encouraged newer approaches, such as computer models and lab-grown human cell systems, to reduce or replace certain animal testing where appropriate. Companies and research foundations spend years (and millions of dollars) hunting for molecules that might help treat conditions.
The goal of this early stage is to decide whether a treatment has enough information to move into human clinical trials.
Phase 1: First Studies in People
Phase 1 is usually the first time a treatment is studied in people.
These studies are small. They often include a limited number of participants (20 to 80) and focus mainly on safety. Researchers look at how the treatment acts in the body, what dose may be appropriate, and what side effects may happen.
Phase 2: Does it Work?
If Phase 1 goes well, the treatment moves to a larger group, often a few hundred people. The focus shifts to effectiveness: Is the treatment doing what it’s supposed to do?
Researchers also continue monitoring safety. This phase can last anywhere from several months to a few years.
Phase 3: Larger Studies With More People
Phase 3 trials include larger groups of participants and may take place at multiple research sites.
These studies help researchers confirm whether the investigational medication works, continue tracking side effects, and compare the expirimental medication with existing options or a placebo when appropriate. A placebo looks like the study treatment but does not contain the active ingredient.
Many clinical trials available to participants are Phase 2 or Phase 3 studies.
Phase 4: Research After Approval
Research may continue even after a treatment is approved.
Phase 4 studies help researchers learn more about long-term safety, real-world use, and how a treatment works across larger groups of people over time.
Before joining any study, you will go through informed consent. This is when the study team explains the study in detail, answers your questions, and helps you understand your choices.
Taking part is always your choice. Interested in learning more? Find a Tekton study near you or read more about how clinical trials work.
