Zoloft

Amber keeps talking about being put on Zoloft and how it completely changed her life but this isn't the first time she was on it. Back in the Gaycare - before they all went to that quack doctor who diagnosed all of them with Bipolar Disorder, she went to a PCP who put her on Zoloft. I think this was in 2018. Why didn't it change her life back then? Why didn't it help her beepydee symptoms the way it does now?