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Vomiting often can throw your electrolytes out of balance. Low levels of potassium, magnesium, and sodium are not uncommon. This is hard on the heart and can cause irregular heartbeat (arrhythmia), weakened heart muscle, and heart failure. Bulimia can cause low blood pressure, weak pulse, and anemia. Throwing up can be a violent event. The sheer force of it can even cause blood vessels in the eyes to rupture.
A variety of causes can make you vomit or feel dizzy. 1  Affected cardiac output: When your heart isnât pumping properly, your blood pressure can drop. This can result in dizziness and vomiting.  Anxiety: Intense feelings of anxiety can lead to physical symptoms, such as dizziness and vomiting.