This document summarizes a study comparing the use of dopamine and norepinephrine in the treatment of shock. The study enrolled over 1,600 patients with shock and randomly assigned them to treatment with either dopamine or norepinephrine. There was no significant difference in mortality rates between the two groups overall. However, patients with cardiogenic shock treated with dopamine had a significantly higher mortality rate than those treated with norepinephrine. Dopamine was also associated with more arrhythmic events compared to norepinephrine. The study concluded that dopamine and norepinephrine have similar effects for most types of shock, but dopamine may be less suitable for patients experiencing cardiogenic shock.