I was prescribed Zopiclone this time last year by the doc as i was having a hell of a time sleeping and getting a decent sleep..
Due to my blood disorder i can’t take Valium so these were one of the few things they could give me.. I don’t remember the metal taste in my mouth however i was smoking loads then and i’ve quit now so mite be different..
I think anything can be habit forming doesn’t matter if its sugar in your tea or taking a pill at bed time..
All “sleeping” tablets should only be used to help get you into a routine again