Clinical Trials: What It Is and What to Expect
Medically reviewed by Harsha Moole, MD, Internal Medicine. Last reviewed: October 2, 2026.
What kind of doctor provides Clinical Trials?
Clinical trials are run by research teams led by trained doctors called investigators, often specialists such as a neurologist. Your regular doctor may stay involved in your care. A direct primary care or concierge doctor can be a first stop for an evaluation and can refer you to a specialist when needed.
What it is
A clinical trial is a research study that tests whether a treatment is safe and works well in people. The treatment might be a new medicine, a device, or a new use of an existing treatment. Trials follow a written plan called a protocol and happen in phases: early phases test safety in small groups, while later phases compare the treatment with standard care in larger groups.
Why a doctor might recommend it
A doctor may suggest a trial when standard treatments have not helped enough or a new option looks promising. Joining is always your choice, and you can leave at any time.
How to prepare
The research team will give you a consent form explaining the trial in plain language, including its benefits and risks. Questions to ask include:
- What the treatment is and how it might help or harm you.
- How often you would need to visit the study site and for how long.
- Whether the trial costs you anything.
- What happens if you want to stop taking part.
What happens during it
The team first checks whether you qualify through a health exam, medical history questions, and lab tests. If you qualify and agree, you sign the consent form. You then receive the treatment being studied, or sometimes a placebo, and attend regular visits so the team can track your health.
Recovery
Most trial visits require no recovery time, and you can usually go home the same day.
Risks and side effects
Every trial carries some risk. The treatment may cause side effects such as nausea or tiredness, and may work no better than standard care. The consent form lists known risks, and no one can promise how a trial will turn out.
Who performs it
Trials are led by investigators, doctors trained in research, with nurses and coordinators handling many day-to-day visits and tests.
How a direct primary care or concierge doctor fits in
A direct primary care doctor is paid a flat monthly fee instead of billing insurance, while a concierge doctor usually charges more and often works alongside insurance. Either can be a helpful partner, offering longer visits to discuss the consent form and referring you to the right specialist.
Common questions
Will I have to pay to join a clinical trial?
It depends on the trial. Many trials pay for the study treatment and related tests, and some cover travel costs. The consent form should explain any costs, and you can ask the team before you join.
Can I leave a clinical trial after it starts?
Yes. You can stop taking part at any time, for any reason, and your regular medical care will not be affected. You simply tell the research team you want to withdraw.
Will I get a placebo in a clinical trial?
In some trials, yes. The consent form will tell you whether a placebo is used and what the other treatment options are. You can ask the team to explain this before you decide.
How do I find clinical trials near me?
ClinicalTrials.gov, a website run by the National Institutes of Health, lists studies in the United States and around the world. You can search by condition and location. Your doctor can also help you look for studies that fit your situation.
Sources
Medical Disclaimer
This content is for general educational and informational purposes only and is not medical advice. It is not a substitute for professional medical advice, diagnosis, or treatment, and reading it does not create a doctor-patient relationship. Always seek the advice of your physician or another qualified health provider with any questions about a medical condition, and never disregard or delay seeking professional advice because of something you read here. If you think you may have a medical emergency, call 911 (or your local emergency number) immediately.
