"i take 15 mg of mirtazapine 1 hour before going to bed and difficulty falling asleep is gone. difficulty staying asleep is gone, and deep, refreshing sleep increase. i have felt no side-effects, its great for allergies too. so my rhinitis is in remission. daytime mood is great. all in all this is the best drug for chronic insomnia/idiopathic insomnia. i have tried eszopiclone, zolpidem, diazem, alprazolam, trazodone, escitalopram, doxepin and mirtazapine is the best of them. best antidepressant ever and best hypnotic ever."