My mother's medication has a highly negative effect on her, but she thinks otherwise. What can I do?

If Lamictal is the only med she is on, there's your problem...they are treating the depressive symptoms but not the mania...you need to speak to your father about your concerns and have him talk to the doctor...she may not be aware that she could need a med change because when you're "up" you feel great! Nothing is wrong and you can do anything!! You don't feel you need any meds...it's a very difficult situation and makes bipolar harder to treat...each person has thier own unique med tail that works for them...looks like your Mom's doc hasn't found hers yet :(