Methods to overcome nervous disorder ?

This is regarding my mother-in law who is presently suffering from acute depression and anxiety. Ours is a nuclear family, me, my spouse, brother-in law, father-in law and mother-in law. Relations between us (me and my spouse with others) are not so cordial. Due to job me, my spouse and my brother-in law are far apart from parents. This has caused a very depression, loneliness and insecurity feelings to my mother-in law. She is presently not feeling well due to hypertension and acute tension prevails.

She has a past history of nervous disorder when she was young on the age of 20-22 years that got very serious after her marriage. Even in my spouse younger age she suffered from the problem and he consulted lots of Physiatrists and Neurologists. Due to change of time and life style the problem was suppressed but still she is suffering from sleeping disorders.

I am eager to know what the best remedies to overcome these situations are. What are the best methods to lead a happily and peaceful life forever.