Suggest Treatmemt For Dementia

Question: MY MOTHER IS 78 YEARS OLD,SHE HAS DEMENTIA,ALSO SHE IS DIABETIC. HER DOCTOR SAID SHE SHOULD NOT BE MEDICATED FOR THE DEMENTIA UNTILL WE COULD NOT DEAL WITH IT ANYMORE,BECAUSE IT WAS HARD ON HER ORGANS AND SO WAS THE DIEABIETES.WELL.......HER DEMENTIA IS WORSENED IN THE LAST 6 MONTHS SO BAD!!!! HER MEMORY IS ??? SHE CANT REMEMBER CONVERSATIONS FROM 5 MINUETS AGO .SHE TELLS THE SAME STORY 15 TIMES ADAY AT LEAST,AND WILL ASK THE SAME QUESTION EVERY 10 MINUETS ALL DAY LONG ,ALSO I BELIEVE SHE IS IN A DEEP DEPRESSION.MY OLDER BROTHER DIED SUDDENLY OF A MASSIVE HEARTATTACK LAST APRIL ,THAT WAS MY MOMS BABY BOY ,THEY WERE VERY CLOSE.HER MOOD SWINGS GO FROM ONE EXTREME TO THE OTHER AT THE DROP OF A HAT.SHE IS VERY AGGATAITED ,REFUSES TO EAT ,CHECK HER SUGAR ,HAS WITHDRAWN FORM GOING TA XXXXXXX CENTER .SHE HAS BEEN GOING 3 TIMES A WEEK FOR 8 OR 9 YEARS AND WOULDNT MISS A DAY EVEN IF SHE DIDNT FEEL WELL.SHE STAYS CONFUSED AND ANGRY ABOUT ANY AND EVERYTHING ,I UNDERSTAND AND I LISTEN TO EVERYTHING SHE SAYS.I DONT GET ANGRY WITH HER AT ALL.ITRY TO BE PATIENT AND EXPLAIN THINGS TO HER SO SHE UNDERSTANDS,TRY TO CALM HER.SOME TIMES IT WORKS SOMETIMES IT DONT.I CANT STAND SEEING HER GO THRU THIS I JUST WANT TO MAKE IT EASIER ON HER MUCH LESS ,LESS STRESSFUL ON ME. I LIVE HER AND BECAUSE IM AFRAID NOT TO BE WITH 24 -7 .PLEASE ANY ADVICE ???ALSO HER MEDS ARE NOVALOG 12MG DAYTIME LANTUS ATBEDTIME 32 MG LIPATOR COREG NOT HOME RIGHT NOW BUT A FEW MORE ,FOR THYROID ,A PAIN PILL FOR BACK AND KNEE PAIN SHE DOSE NOT TAKE IT UNLESS SHE IS REALLY HURTING