Long term antidepressant use can disrupt many areas of the body, for example, the health of the liver, hormonal balance, kidney health, the emotions and the nervous system. When an artificial substance is removed or weaned from the body, such as in your case the anti-depressant this can have a strong effect on the bodies ability to cope and the body begins to crave the substance. This creates a dependancy situation and therefore when it is removed from the body many people will experience very strong detoxification and addictive symptoms. These feelings should not be long term and the body should re-balance over time if allowed. However these weaning reactions can be very overwhelming for many individuals and very difficult to move through.