First of all, I am very sorry for your loss.
Secondly, I do NOT advise cutting the tablet in half. You should take the dose prescribed at the same time every day.
That being said, you CAN take it in the morning.
Understand that this medicine WILL help, but that the medicine takes some time, up to a few weeks, to have its full effect.
It is not uncommon to have some side effects on initiation of the medicine, and these generally become less bothersome over time.
THIS IS A GOOD REFERENCE FOR YOU.
I think transitioning to a morning dose would be fine. To do this I would skip your next evening dose and take the full dose the following morning.
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I hope you begin to feel better soon.