A Phase III clinical trial involves a large number of patients. Their aim is to show whether or not a new treatment is better than the current standard treatment. The trial involves 2 groups: one group of patients will get the standard treatment, and the other group will get the newer treatment. It is usual for the patient and the doctor not to know which of these treatments the patient is receiving. Because the trials involve a larger number of patients, this study also gives a better understanding of the potential side effects of the new treatment.
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