The main components of these three drugs are quetiapine fumarate, but the manufacturers are different. Regarding the treatment of schizophrenia, medication is mainly explored according to the specific situation of patients. It depends on what symptoms you have. If you have taken Vestibone now, it is recommended to use it alone, not in combination, which may increase the side effects of the drug. At present, you are taking 4 tablets of Visteon. If the symptoms are out of control and there is no obvious discomfort, I suggest you gradually increase the dose, with a maximum dose of 6 tablets. The most important thing is to suggest that you go to the psychiatric clinic for regular review. The doctor will adjust the medicine you take according to your specific situation, and you must never reduce or stop taking it yourself.