Because of its effects on serotonin and norepinephrine, Zoloft is more effective than other antidepressants for some patients. Zoloft works for Doxycycline brand name the majority of patients with major depression, panic disorder and obsessive compulsive disorder (OCD). It may also be prescribed off-label for bulimia nervosa, Doxycycline brand name post-traumatic stress disorder, premenstrual dysphoric disorder, and social anxiety disorder.