I am a sufffering from Major depression and i am free of depression, but these ssri ?

ssri s causing me dry mouth, flushing and thirsty....all of the ssri s or snri s tried are , but still i have problem and i guess this is due to "lower seizure threshold"?..................currently i am on sertraline 150 mg (zoloft), Lamotrigine 100mg (lamictal), frisium 25 mg, and my said that , he would increase Lamotrigine dosage slowly......