Antidepressants are grouped into different classes,.....most SSRIs are similiar to other SSRIs, same with SNRIs, MAOIs, and Tricyclics. There are significant differences unique to each specific drug. Probably the most commonly shared trait, is side effects.....SSRIs have a specific set of side effects, different from SNRIs, MAOIs, ect.
In terms of vanquishing SA, it completely depends on the individual, and which drug they are taking. SSRIs seem to work great for some people, while for others, they are completely ineffective. Usually, most people get a combination of effectiveness and and side effects, the balance of both , determines if its worth it to continue taking the drug. For me, SSRIs definetly reduced my SA, but they did not vanquish it. Zoloft, Paxil, Lexapro, ...all decreased my worry, about whether or not I said the right thing in social situations. Overall, they helped me talk more, made me want to talk more, and made me worry less about how i talked/what people thought of me. But, I experienced a lot of Emotional numbing, I could not feel normal emotions as clearly, I felt kinda of blank and numb.
I haven't tried SNRIs adequately........MAOIs, specifically Parnate, are significantly more effective in reducing my Depression. Parnate is somewhat helpful in reducing my SA, many people apparently have better responses, at higher doses such as 40-60mg/day, I am only taking 20mg a day.