Hello....I Am Researching Insomnia Meds For My Mother-in-law. She Is

Hello....I am researching insomnia meds for my mother-in-law. She is currently taking Prozac and has for years. She has been doing quite well until her son, my brother-in-law was killed the 13th of Dec. She has not been able to sleep and is quite fragile with the loss. I want to help her.. her doctor (who is new)..old doctor retired.. has put her on Ambien...now on for 3 days...no help sleeping. I believe different meds affect different people. However, she is 89 and in good health until her sons death shocked her system. I have been reading about Dalmane, generic Flurazepam...and it seems as if alot of people are happy with the results compared to others they have tried.....can you help with any info