I had side effects like that, and even a bit more exaggerated when I tried Respiradone, I rang the doctor and I was told to stop it immediately..Then I was put on 25mg seroquel and slowly built it up to 100mg. I took a couple of months to see significant improvement but now I do feel a lot better and even though I sometimes I have problems of inexplicable drowsiness (a side effect that hasn't worn off as the others) I wouldn't change the drug as it seems to be the lesser of all evils.
But you need to find what works for you, and even though every drug has side effects that in the first few weeks are rather annoying and/or troublesome, you shouldn't have to put up with anything that is listed as severe or anything that you can't handle..