Hi I Am Wondering If My Sister Is Suppose To

Hi i am wondering if my sister is suppose to take these three medications together,sometimes she isnt quite honest about things and i didnt get a chance to make ut to her doctor appt.i actually dobt think she us taking her meds as prescribed. The three medications are:CARBAMAZEPINE 200MG 3 TIMES A DAY,LAMOTRIGINE 200MG TWICE A DAY, PHENOBARBITAL 32.4MG,1 TAB EVERY 12 HOURS,SHE still has seizures. (I know she isnt taking all these because only the PHENOBARBITAL seems to be disappearing....