Cymbalta (duloxetine) can cause a range of side effects when you stop taking it, especially if you discontinue it abruptly. This is known as a withdrawal or antidepressant discontinuation syndrome.

Cymbalta (duloxetine) is a brand-name delayed-release oral capsule that the Food and Drug Administration (FDA) has approved to treat the following conditions in adults: Cymbalta belongs to the ...

Cymbalta is the brand name for duloxetine, and Effexor XR contains the active drug venlafaxine. These are prescription drugs called serotonin-norepinephrine reuptake inhibitors (SNRIs).