There square measure 3 stages of clinical trials. clinical test trials enter a restricted variety of individuals. They usually focus on the proper dose and relative safety of a specific drug. clinical trial trials enter a lot of individuals and square measure wont to verify if the new drug really works against a specific unwellness. clinical trial trials square measure the ultimate part before a drug is approved for treating a wellness. throughout clinical trial, the new drug is compared against the prevailing treatment. The goal throughout clinical trial is to prove the new drug could be a simpler treatment.