TYPES OF CLINICAL TRIALS

There are several clinical trials which are listed below:

INTERVENTIONAL TRIALS:

These are clinical trials which set out to test treatments or combinations of treatments which have not yet been officially approved. For example, a pharmaceutical company may have developed a new drug which it believes would be effective in the treatment of Alzheimer’s disease but must first test it on human volunteers in accordance with strict and rigorous guidelines in order to ensure that it is safe and effective. Some drugs might be aimed at curing a particular condition, whereas others might be aimed at better controlling symptoms of a particular condition.

PREVENTION TRIALS:

It involve tests to find ways to prevent particular medical conditions or if people have them already, to prevent them from reoccurring. The emphasis of these studies might be on medicines, vitamins and minerals or lifestyle changes.

OBSERVATIONAL TRIALS:

It investigates health issues in large groups of people. The participants in such clinical trials do not receive any treatment but may be asked vide information, blood samples.

PHASES OF CLINICAL TRIALS:

Phase 1 Clinical Trials

If studies in animals suggest efficacy and safety, a phase 1 trial can be conducted in a small group (10-30) of human volunteers over 2-12 months, primarily to test for safety and to identify side effects, but also to get some information on effective dose.

Phase 2 Clinical Trials

Phase 2 clinical trials involve more volunteers than phase 1, and they typically last about two years. They usually involve two or more groups receiving different doses of the new drug in order to establish its therapeutic range of the drug, i.e., doses at which it is effective and has an acceptable level of side effects. If results suggest efficacy and safety, a phase 3 trial will be conducted.

Phase 3 Clinical Trials

Phase 3 trials are similar to prospective cohort studies in their design, except that the exposure of interest is a drug or some other intervention that is randomly assigned to the participants by the investigators. 

Read more: Paid Clinical Trials San Diego