Abstract

Clinical trials testing new treatments are divided into different stages, called phases. The foremost phase trials may look at whether a medicine is safe or the side goods it causes. latterly phase trials aim to test whether a new treatment is better than being treatments. There are 3 main phases of clinical trials – phases 1 to 3. Phase 1 trials are the foremost phase trials and phase 3 is after phase trials. Some trials have an earlier stage called phase 0, and there are some phase 4 trials done after a medicine has been certified. Some trials are randomised. This means the people taking part are put into one of the treatment groups at arbitrary. Doing this means the results are more dependable.