Yes. No question.
If you're re-applying, it means you've had time to improve your application-- volunteering, taking/retaking more classes, taking/retaking the PCAT, working in a pharmacy. To do these things and then submit the exact same essay would make no sense to me. You'd want to incorporate into that essay why you are reapplying, what you have done to make yourself stand out as a better candidate this year, how the application process changed your views on pharmacy, anything at all to show that you have continued to improve and haven't just vegetated for a year.
Not rewriting would (to me, but I'm no authority on it) be indicative of a candidate's laziness. So if you find yourself in the position of reapplying, best of luck to you, and rewrite those essays. 🙂