Clinical trials can vary in size and cost, and they can involve a single research center or multiple centers, in one country or in multiple countries. Clinical study design aims to ensure the scientific validity and reproducibility of the results.Trials can be quite costly, depending on a number of factors.ne way of classifying clinical trials is by the way the researchers behave. 1  In a clinical observational study, the investigators observe the subjects and measure their outcomes. 2  In an interventional study, the investigators give the research subjects a particular medicine or other intervention.
It is important to note that olopatadine is considered the generic name of Patanol; it is not a generic version of the drug.Patanol Â® (olopatadine ophthalmic solution) is a prescription eye drop approved for treating signs and symptoms of eye allergies (known medically as allergic conjunctivitis).t is currently under the protection of a patent that prevents any generic Patanol from being manufactured in the United States. The first patent for this drug is currently set to expire in June 2011, although Alcon also has a patent for Patanol that expires significantly later (June 2015).
The U.S. Food and Drug Administration today approved the first generic versions of Zyprexa (olanzapine tablets) and Zyprexa Zydis (olanzapine orally disintegrating tablets) to treat schizophrenia and bipolar disorder. Schizophrenia is a...