You're correct.  More evidence is out that antidepressants work less effectively than placebo, meaning they are depressants not antidepressants; I mean if logic means anything to you  In contrast, some antidepressants have been outed as placebos, and here's more info on webmd about it, with links to the studies.  The reason people have reported them working is because they are clearly psychotropic--they make you think and feel overtly, noticeably different.  The tingling means: it's working.  (Except that it's not, but your hopefulness is.)  https://www.reddit.com/r/conspiracy/comments/3v4ags/herbs_dont_work_except_when_they_do/