Antidepressants are drugs used to prevent or treat clinical depression. People suffering from depression often experience anxiety as well. In fact, as many as 90% of people who've been diagnosed with depression also have symptoms of anxiety. Whether you suffer from depression, anxiety, or both, it is important to seek the care of a healthcare professional. Depression and anxiety are serious illnesses that require medical intervention. About 4 million suffer from generalized anxiety disorder (GAD) specifically. Men and women of all ages are affected. The good news is that depression and GAD are both treatable.