I have been dealing with bad anxiety and derealisation recently, and the doctor has given me a prescription for zoloft 50mg and I am scared to take it. I do not want to be on medication for the rest of my life, I am only 22 will this change my brain chemistry forever? I also do not want to lose my sex drive this young. 

Its ironic but I am having REALLY bad anxiety about taking something that is meant to cure it..