I'm taking amitryptiline now for almost 5 weeks. My sleep was very good in the first 2 weeks, but since then I only sleep about 7 hours a night.

What happened is that I am still very tired during the day, without beeing able to sleep. The tiredness is somehow sublinimal, meaning that I do not yawn all the time or my eyes keep shutting down, however I feel like a zombie.

Overall my mental condition is better than a few weeks before(less thinking fatiguing) but physically it started to develop into the opposie direction.
And what worries me the most is that, in some situations my speech becomes even slurred,because of the tiredness.

The point is I didn't have these feeling when I slept well in the first 2 weeks. Is it maybe the cumulative deprivation of sleep or a sudden intolerance of amitryptiline? My doctors couldn't tell excactly where it comes from.

Did anyone experience something similar?