I believe placebo-controlled trials are very necessary. There is something known as the placebo effect which is when a placebo drug or treatment is not due to the actual drug/treatment but due to the patient’s belief. If patients knows what type of treatment they are about to receive, they may convince themselves that it is actually working. I do believe that it should be necessary for non-life threatening disease/illness and not if the person has something severe. An example of something severe would be like cancer. The reason for this is because it may discourage that person.