One common cause of hyperprolactinemia is a growth or tumor on the pituitary gland called a prolactinoma. The tumor produces high levels of prolactin. These tumors can be large or small and are usually benign, meaning they are not cancerous. Large tumors can also cause headaches, vision problems, or both.
The most common symptoms of atypical antidepressant withdrawal, including Cymbalta, are anxiety and low mood, such as apathy and rebound depression. Because Cymbalta strongly affects serotonin, after discontinuation it can take several days for the body's own serotonin system to return to normal.
Severe Side Effects of Cymbalta. Sadly, users of Cymbalta have also suffered serious, and at times fatal, side effects. The drug may cause seizures or convulsions, manic episodes, changes in blood pressure and falls. And it can be life-threatening when used simultaneously with other central nervous system (CNS) stimulants.