I'm a firm believer in trial and error and "listening" to what your your body tells you.
I took this for a short time (about three months) and did not expereience anything at all like you are in the beginning or in the end.
It did make me a bit too agitated in general, but never nauseous or depressed, so I stopped and tried something else.
I would drop this drug and move on to something more benign.