"i have read so many things and do not know what to believe. i have post traumatic stress disorder and have taken sleep aides from the health food store which left me with vertigo and not feeling well. i have not had any of the usual  side effects with ambien and it leaves me refreshed however i do have one weird side effect and i was not sure at first if it was the ambien. but it is. i am usually a person who is cold and likes the heat. but i have gotten heat sick several times and living in nyc where there is no air and we are constantly having heat waves it has made me sensitive to heat. i am super sensitive and usually if there is a side effect to be had i get it but really i have not had anything except the heat exhaustion. i mean  sweating, etc."