Paroxetine is primarily used as an antidepressant in the treatment of various mental health conditions. It is commonly prescribed for managing major depressive disorder, helping to alleviate symptoms such as persistent sadness, loss of interest, and fatigue. It is also effective in treating anxiety disorders, including generalized anxiety disorder, social anxiety disorder, and panic disorder. Additionally, paroxetine is utilized for obsessive-compulsive disorder (OCD) to reduce intrusive thoughts and repetitive behaviors. In some cases, it is prescribed for post-traumatic stress disorder (PTSD) to help manage symptoms like flashbacks and emotional numbness. Paroxetine works by increasing serotonin levels in the brain, which improves mood and reduces anxiety. It is often chosen for its efficacy and relatively favorable side effect profile compared to other antidepressants.