"i have had problems with insomnia for years. after 8 years of taking ambien, which worked great for several years, i built up a tolerance and asked my doctor about switching medications. he prescribed trazodone, and after reading reviews, i had high hopes for the medication. unfortunately, it did little to help my insomnia and left me with severe congestion and a headache. after 4 or so hours i would wake up with my mind racing and was unable to sleep. my doctor added klonopin. i feel asleep quickly but rarely got more than 4 or 5 hours of sleep a night. very disappointed."