I've been taking promethazine for probably 10 weeks now to help me sleep. It did seem to work relatively well. I would still wake up bit I could drop back off to sleep quite easily. I was also prescribed it for during the day and sometimes take it in the morning if I'm feeling particularly anxious.

The last few nights it doesn't seem to have been working as well. Now it could be that because I have felt more anxious over the last few days, but I'm not sure. Could it have stopped working? In my prescription I can take 2 at night, wondering if I should try that?

I'm sure I did read somewhere that you can build up a tolerance to it. If so would upping the dose help?