My 77 yr old mother has taken Valium since the 1970’s. She quit smoking about 15 yrs ago because she has emphysema. She is sort of a nervous person who worries about everything so she has always taken Valium to help with that anxiety. Now, at 77, she is depressed and thinks life is basically over, and when she gets low on Valium her worrying gets worse. Seems to me she is hooked on Valium and it is aiding in her depression. Any thoughts on that?.