Used primarily in the treatment of major depressive disorder, paroxetine mesylate is effective in managing symptoms of anxiety disorders including generalized anxiety disorder, panic disorder, and social anxiety disorder. It is also prescribed for obsessive-compulsive disorder and post-traumatic stress disorder. Due to its action on serotonin levels in the brain, it helps regulate mood, sleep, and behavior. Additionally, it may be used off-label for conditions such as premenstrual dysphoric disorder and certain types of chronic pain. The mesylate salt form enhances stability and bioavailability, making it suitable for oral dosage forms.