hello 2 days ago i switched from 25 mg to 40 mg strattera and i feel a bit nausea. just abit but its unconfortable. im concentrated. not as I wish I could be but i still am, since i began taking 25 mg 2 months ago especially since the second month. i had a lot of energy, but now i feel not as energetic i was before. some people told me is due i had to move on to 40 mg. i did but im on my second day. any advices?