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.
Side Effects. There are a number of common side effects with the use of Cymbalta. Many of these should lessen or disappear after a few weeks of taking the medication. If they do not disappear or worsen, you should contact your doctor: 1  Stomach problems, such as nausea, constipation, or loss of appetite.