Does each mg of zoloft used treat a different level of depression?

hi i saw a psychiatrist friday the 30th and he prescribed to me zoloft. now the 3 different mg doses(25mg, 50mg, 100mg) i was wondering if each mg strengths were used to treat different levels of depression. btw the psychiatrist prescribed me 100mg of zoloft. i have to take half a pill for 10 days and then... show more hi i saw a psychiatrist friday the 30th and he prescribed to me zoloft. now the 3 different mg doses(25mg, 50mg, 100mg) i was wondering if each mg strengths were used to treat different levels of depression.

btw the psychiatrist prescribed me 100mg of zoloft. i have to take half a pill for 10 days and then start taking 1 pill a day after that.
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