Is it required to deduct "State Income Taxes Paid" if you itemize (Schedule A)?

I'm itemizing this year because I had huge medical expenses.  However, I don't want to include the "State Income Taxes Paid" as a deduction because then if I receive it as refund next year I will have to pay income tax on it because I received a deduction for it this year.  If you file a Schedule A, is it mandatory to include "State and Local Income Taxes Paid" Line 5a?