Medical research is of two types; observational studies and clinical trials.
Observational studies observe people in normal settings. Researchers gather information, group volunteers according to broad characteristics, and compare changes over time. These studies may help identify new possibilities for clinical trials.
Clinical trials are research studies performed in people that are aimed at evaluating a medical, surgical, or behavioural intervention. They are the primary way that researchers find out if a new treatment, like a new drug or diet or medical device (for example, a pacemaker) is safe and effective in people. Often a clinical trial is used to learn if a new treatment is more effective and/or has less harmful side effects than the standard treatment.
Clinical trials look for the ways that are used to detect any disease even before the onset of symptoms. Clinical Trials in Las Vegas may also look at how to make life better for people living with a life-threatening disease or a chronic health problem.
Phases of clinical trials: Clinical trials advance through four phases to test a treatment, find the appropriate dosage, and look for side effects. And mostly these clinical trials are used before the final production of any drug.
Phase 1: it involves an experimental treatment on a small group of often healthy people (20 to 80) to judge its safety and side effects and to find the correct drug dosage.
Phase 2: the emphasis in phase 2 is on the effectiveness of the drug and it includes more people around 250-300. These clinical trials also continue to study safety, including short-term side effects. This phase can last several years.
Phase 3: the number of subjects increased more in this phase around 3,000 people and this phase based on the clinical trials to test the effectiveness of the drug in combination with other medications. If the FDA agrees that the trial results are positive, it will approve the experimental drug or device.
Phase 4: this phase is for trial for drugs or devices takes place after the FDA approves their use. A device or drug's effectiveness and safety are monitored in large, diverse populations.
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