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Home > Patient & Family Resources > Health Library > Clinical Trials
Clinical trials are research studies in which people help doctors find ways to improve health care. Each study tries to find better ways to prevent, diagnose, or treat health problems.
The purpose of a clinical trial is to find out whether a medicine or treatment is safe and effective for treating a certain condition or disease. Clinical trials compare the effectiveness of this medicine or treatment against standard, accepted treatment or against a placebo if there is no standard treatment.
Taking part in a clinical trial is voluntary. No one can make you participate. If you choose not to take part, you will be offered the standard treatment for your health problem. You can talk to your doctor if you have questions about clinical trials.
Clinical trials are important because they compare new treatments with accepted treatments. They allow researchers to find out if a new treatment works as well as or better than accepted treatments. The new treatment might have fewer or less serious side effects. The new treatment also might not work as well or might cause more side effects than standard treatments.
Clinical trials help drug companies make medicines that are safer and more effective with fewer side effects. Clinical trials also help these companies decide whether it is worthwhile to seek approval from the U.S. Food and Drug Administration (FDA) for a certain medicine. If a medicine doesn't work as well as standard treatment, then the FDA isn't likely to approve it.
Clinical trials are also important in finding treatments if no standard treatment exists.
Taking part in a clinical trial may not benefit you directly. But in the future it may help other people who have the same disease.
Your doctor will help you find out if you are eligible to take part in a clinical trial. The company sponsoring the trial will have a very strict set of standards, or criteria, that all participants must meet.
If you meet the criteria, you may be "randomized" to get either the new medicine, a medicine that is considered standard therapy, or a placebo. That means that a computer is used to randomly assign you to one of the treatments. In many studies, neither you nor your doctor knows which treatment you are getting. But not all clinical trials randomize people. And if you have a serious disease, such as cancer, you will not be given only a placebo, unless no effective treatment is known.
After you are accepted by the clinical trial and you give your consent to take part:
Doctors, nurses, social workers, and other health professionals may be part of your treatment team.
Be sure to carefully follow instructions. If you don't know what you are supposed to do next, call your doctor. Or call the person responsible for your trial.
A medicine or treatment must go through three phases before it is approved for use by the U.S. Food and Drug Administration (FDA).
After a clinical trial is completed and the results are studied, the FDA decides whether to approve continued development of the medicine. If the medicine that you received remains in development, you may be able to get more doses as an extension of the study.
If the results of the clinical trial show that the new medicine or combination of medicines works much better than standard treatment, the new medicine may become available to the general public.
Your treatment team may continue to check on you after your trial is over.
You should be fully informed about the possible risks of the trial before you agree to participate.
Every clinical trial in the United States must be approved and monitored by an institutional review board (IRB) to make sure that the risks are as low as possible and are worth any potential benefits.
The ethical and legal rules for medical practice also apply to clinical trials. Most clinical research is regulated by the U.S. government, with specific rules to protect the participants. Clinical trials follow a carefully controlled study plan (protocol) that explains what everyone will do in the study. During the clinical trial, researchers report the results of the trial at scientific meetings, to medical journals, and to government agencies. Your name will remain secret and will not be mentioned in these reports.
Sometimes the group sponsoring your trial will be responsible for the cost of the medicine as well as the costs of medical tests that are required while you are in the trial. (Clinical trials usually require you to have more medical tests than you would have if you were not in the trial.) But in other trials, the cost of the medicine and only some of the medical tests will be covered. Some studies will reimburse you for the cost of traveling to and from your medical visits.
The U.S. National Institutes of Health, through its National Library of Medicine, has developed ClinicalTrials.gov to provide information about clinical research studies to patients, family members, and members of the public. You can contact this service online at www.ClinicalTrials.gov. Or you can get information over the phone by calling 1-888-346-3656 or (301) 594-5983 and selecting option 1. For cancer-related clinical trials, go to www.cancer.gov, or call 1-800-422-6237 (and select option 1).
There may or may not be a clinical trial available in your area that relates to your particular disease or stage of disease.
Current as of: December 19, 2018
Author: Healthwise StaffMedical Review: E. Gregory Thompson, MD - Internal MedicineKathleen Romito, MD - Family MedicineMichael S. Rabin, MD - Medical Oncology
Current as of:
December 19, 2018
Medical Review:E. Gregory Thompson, MD - Internal Medicine & Kathleen Romito, MD - Family Medicine & Michael S. Rabin, MD - Medical Oncology
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