Health Care Health

Know About Clinical Investigations and Trials   


jauhar khan
@jauhar123 | Posted 30 May. 2019


A clinical study includes research using human volunteers (also called participants) that is expected to add to medical knowledge. There are two main kinds of clinical studies: clinical trials (also called interventional studies) and observational studies.


Clinical trials are essential to the growth of new medical therapies and diagnostic tests. Without clinical trials, we cannot accurately determine whether new treatments developed in the laboratory or by utilizing animal models are effective or safe or whether a diagnostic test may work well. This is because computer simulation and animal experimentation can only tell us so much about how a new treatment might work and are no replacement for testing in a living human body.



Clinical trials also provide testing and monitoring of the effect of a treatment on a huge number of people to ensure that any improvement as a result of the operation occurs for many people and is not just a random result for one person. Most standard medical procedures exist a direct result of clinical research.


New treatments for all diseases and conditions — including cancer, high blood pressure, heart disease, and asthma — have been developed through clinical research. Clinical trials usually lead to new treatments that help people to live longer and to have less pain or disability. You can know more information through Clinical Investigations Journal that provides you clear data about clinical research.

Impact of Clinical Trials:

It is no accordance today that “the age-adjusted passing rate in the US for coronary heart attack was cut in half from 1980-2000” because much of this growth was the result of investing in basic and clinical investigation. In reality, while half of the decrease is attributed to reducing in cholesterol levels, blood pressure, and smoking, the other “half of this decrease can be quickly attributed to medical therapies validated in clinical trials.”

Phases of Clinical Trials:

  • Clinical trials advance within four phases to test a method, find the appropriate dosage and see for side effects. If, after the first three phases, researchers obtain a drug or other interruption to be safe and effective, the FDA allows it for clinical use and proceeds to monitor its effects. Clinical trials of drugs are regularly reported based on their phase. The FDA typically needs Phase I, II, and III trials to be carried to determine if the drug can be approved for use.



  • A Phase I trial tests a test treatment on a small group of often strong people (20 to 80) to decide its safety and side effects and to discover the correct drug dosage.


    A Phase II trial applies to more people to gather specific information. While the importance in Phase I is on safety, the emphasis in Phase II is on effectiveness. This phase aims to collect preliminary data on whether the drug works in people who have a particular disease or condition. These trials also stay to study safety, including short-term side effects. This phase can be used for the last several years.


  • A Phase III trial finds more information about safety and effectiveness, studying various populations and various dosages, utilizing the drug in combination with other medicines. The number of cases normally varies from a number of people about 3000. If the FDA accepts that the trial results are positive, it will allow the experimental drug or device.

  • A Phase IV trial for medications or devices takes position after the FDA accepts their performance. Well, the performance is observed in large, different populations. Sometimes, it does not display the drug which is clear until more people have taken it over a more extended period.


Clinical research also studies and make trails on significant areas of neurology. You can learn more about neurology in the Neurology Journal which provides you more information.