Hi there I have taken zoloft..I am not a teen but for me I took 50mg a day and it really helped thru the time when I needed it..it usually takes a few weeks till it starts working....I am not one to take meds I usually perfer the more natural holistic approach and when I went off zoloft that is what I did..diet , exercise, vitamins...meditaition (yoga).
Hope all is well sending you peace and strength your way