"after heart surgery in 2014 i went from having normal sleep to insomnia and vivid dreams. after 10 months i medications and dietary supplements.  i have recently tried lunesta and i have found that i only get 2-3 hours sleep on lunesta and i do have that taste in my mouth went to a doctor. we have been trying different the next day. ambien works great but it is a wicked medication to take for very long.  you build up a tolerance to it and the withdrawals, for me, are 2 nights without any sleep.  my doctor and i are still working on a treatment and a cure. medical marijuana is out of the question for me but has been recommended by my colorado relatives but i&#039;m not going there."