It's very possible, as far as you're resolute about it, got good points, meet with the right people in your prospective department, then, inter-departmental transfer won't be impossible. But one thing is needful, you've got to prayerfully initiate the process and back it up;)
I started with B.Sc in Biology in one of the Universities in South-West

and got transferred to Computer Science Dept. after
my year one, you can imagine,
changing from biological science to a physical science. Though it wasn't easy, But thank God it eventually worked out.

. I could remember, i had my original "change of course " form missing in transit! I just couldn't believe the manipulations, looked for it for some days and no breakthrough :-\But thank God i had the photocopy!!! It was the photocopy I used to complete the transfer process!
So, don't give up, try your very best and let God lead you!!
All the Best!
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