hi i m 41 eras old house wife.i m suffering from bipolar disorder problem right now but i have depression problem for last 15 years. doctor prescribed me 'LITHOSUN SR 400" once in morning after food along with five other medicine but this tablet didn't suit me and then he suggested for "DEPAKOTE 500" tablet in place of lithosun. so i want to know that can it be replacement for my problem?