Am taking anti-depressant medicine and am afraid that am damaging myself

Patient: Okay..i am 19 years old ,165 cm long..and i weight 57 kilos..diets dont work for me as i already eat healthy..mostly fruit..and i just dont loose calories per day rarely exceed a 1000 ..i also work out 3 days a week…nothing is workingso to loose weight..i take an anti-depressant pill that closes my appetite..its called “effexor”..i take 3 pills a day..75 mg eachi knw its stupid and wrong..but it works..the only symptom i’ve noticed is that it causes fatigue..i really want to know if am causing serious unnoticed damage to my self..or if i might face a serious problem in the long run..thank you..