tinks, i've been through a number of periods in my life when sleeping has become impossible. i visited my gp in the end and had a good chat with her about it. she prescribes zopliclone 3.75mg for me, only 14 of them on the prescription and only to be taken when i'm desperate, not on a regular basis. i can't remember the last time i took one but to be honest, just the fact that they're sitting in my bedside table and i know they're there is almost a much a help as the tablets themselves are.
i have 4 of the 14 tablets left and the date on the box is 2009 so that's how often i've taken one. it really is worth a gp visit tink, nothing worse than lacking a decent nights sleep and going into a downward spiral about it.