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About Clinical Trials

What are clinical trials?

A clinical trial is a research study in human volunteers to answer specific health questions. Carefully conducted clinical trials are the safest and fastest way to find treatments that work in people, and new ways to improve health. There are different kinds of clinical trials, including those to study:

-prevention options

-new treatments or new ways to use existing treatments

-new screening and diagnostic techniques

-options for improving the quality of life for people who have serious medical conditions

Clinical trials are conducted according to a plan called a protocol. The protocol describes what types of patients may enter the study, schedules of tests and procedures, drugs, dosages, and length of study, as well as the outcomes that will be measured. Each person participating in the study must agree to the rules set out by the protocol.

Why are clinical trials done?

Many clinical trials are done to see if a new drug or device is safe and effective for people to use. Clinical trials are also done for other reasons. Some compare existing treatments to determine which is better. The current, approved treatments are called the “standard treatments.” Sometimes clinical trials are used to study different ways to use the standard treatments so they will be more effective, easier to use, and/or decrease side effects. Sometimes, studies are done to learn how to best use the treatment in a different population, such as children, in whom the treatment was not previously tested.

For most trials, researchers, doctors, and other health professionals administer the clinical trials according to strict rules set by the Food and Drug Administration (FDA). FDA sets the rules to make sure that people who agree to be in studies are treated as safely as possible.

Where can people find out about clinical trials?

People can find information about clinical trials now being conducted now by searching is an interactive online database, managed by the National Library of Medicine. It provides information about both federally and privately supported clinical research in human volunteers. is updated regularly and offers information on each trial’s purpose, who is eligible to participate, locations, and phone numbers to call for more information. Since is only available online, individuals without Internet access can use the database at the public library or other publicly available internet portal.

What types of clinical trials are available?

There are many different kinds of clinical trials, including:

Trials that test new treatments, new combinations of drugs, or new approaches to surgery or radiation therapy.

-Prevention trials, that looks for better ways to prevent disease in people who have never had the disease or to prevent a disease from returning. These approaches may include medicines, vitamins, vaccines, minerals, or lifestyle changes.

-Diagnostic trials, which are conducted to find better tests or procedures for diagnosing a particular disease or condition.

-Screening trials to test the best way to detect certain diseases or health conditions.

-Quality of Life trials (or Supportive Care trials), that explore and measure ways to improve comfort and the quality of life for individuals with a chronic illness.

Usually, clinical trials compare a new product or therapy to something else to see if it works as well or better to treat or prevent a disease or condition. In a blinded study, a participant may be randomly assigned to receive the test product, or an existing, approved therapy. In some studies, participants may be assigned to receive a placebo (a product with no therapeutic action that looks like the test product). Comparison with a placebo can be the fastest and surest way to demonstrate therapeutic effectiveness of new products. However, placebos are not used where a patient would be put at risk, particularly in the study of treatments for serious illnesses, by not having effective therapy. Most studies of this kind compare new products to an approved therapy. Potential participants are told before they enter a trial whether placebos are going to be used in the study.

Who should consider clinical trials and why?

It is important to test drugs and medical products in the people they are meant to help. It is also important to conduct research in a variety of people because different people may respond differently to treatments. FDA seeks to ensure that people of different ages, races, ethnic groups, and genders are included in clinical trials.

Some people participate in clinical trials because they have exhausted standard (approved) treatment options – which either did not work for them, or they were unable to tolerate certain side effects. Clinical trials may provide another option when standard therapy has failed.

Other people participate in trials because the want to contribute to the advancement of medical knowledge. For each clinical trial, researchers develop eligibility criteria, such as the age, sex, type and stage of disease, previous treatment history, and other medical conditions. These criteria help to reduce the amount of variation in the study, without threatening the scientific integrity of the trial, by removing medical variations that might complicate analyzing the results.

Not everyone who applies for a clinical trial will be accepted. Volunteers may be excluded based on the eligibility criteria and/or the number of participants needed by the researchers to collect enough information to determine the safety and effectiveness of a therapeutic agent.

Where are clinical trials conducted?

Clinical trials can be sponsored by an organization such as a pharmaceutical company, a federal agency – for example, the National Institutes of Health or Veterans Administration or an individual, such as a physician or health care provider. The sponsor determines the location(s) of the trials which are usually conducted at universities, medical centers, clinics, doctor’s offices, and/or at hospitals, federally- and industry-funded research sites.

Are clinical trials safe?

The FDA works to protect participants in clinical trials and to ensure that people have reliable information as they decide whether to join a clinical trial. The federal government has regulations and guidelines for clinical research to protect participants from unreasonable risks.

Although efforts are made to control the risks to clinical trial participants, some risks may be unavoidable because of the uncertainty inherent in medical research studies involving new medical treatments.

The government requires researchers to give prospective participants complete and accurate information about what will happen during the trial. Participants must sign an “informed consent” document before joining the study indicating they understand that the trial is research, and that they can leave the clinical trial at any time. This informed consent is part of a process that ensures a prospective participant in a clinical trial understands what known risks might be associated with the study, and whether there are potential, but as yet unknown risks that may be associated with the product being studied. This information permits someone deciding whether or not to enter a clinical trial to make an informed decision about the level of risk they are willing to accept before they enter the trial.

What should people think about before joining a clinical trial?

People should learn as much as possible about the clinical trials that interest them. They should also feel comfortable discussing their questions and concerns with members of the health care team. Prospective participants should understand what happens during the trial, the type of health care they will receive, and any costs to them – which may or may not include the cost of the product, costs associated with administering the product, etc.

Anyone considering a clinical trial should also know that there are benefits and risks associated with participating. Participating in well-designed and well-executed clinical trials is one approach for eligible patients/volunteers to get actively involved in their health care.

Participants will have:

Access to expert medical care for the condition being studied, since investigators are often specialists in the disease area being studied.-Access to treatment with experimental or study medications not widely available elsewhere.

-Care from a research team that includes doctors and other health care professionals who are familiar with the most advanced treatments available.

-Treatment that has been reviewed by many people, including other doctors and researchers.

-A full health assessment and diagnosis with all lab tests and physicals completed in our clinic.

-Research-related care or medicine at no cost and no insurance is needed to participate.

-Complete privacy and confidentiality and no health insurance plan is ever contacted or used.

-Opportunity to learn more about an illness and how to take care of it.

-The satisfaction of helping others by contributing to medical knowledge, or helping to identify possible new treatments.

-Compensation for time and travel.

Generally, the treatment will be stopped at the end of the trial, even if the participant feels it is beneficial. Some sponsors continue to provide product while others do not.

What’s the role of the FDA in approving new drugs & medical treatments?

The Food and Drug Administration’s job is to make sure medical treatments are safe and effective for people to use. However, FDA does not develop new therapies, or conduct the clinical trials to demonstrate safety and effectiveness. FDA staff members meet with researchers, and perform inspections of clinical trial study sites to protect the rights of participants and to verify the quality and integrity of the data.