Hi Display: A $500.00 prescription would certainly make me nervous and double-think too. Even if you are getting reimbursed.
I don't have health insurance and I tried NeedyMeds.org. Go visit their website. It is perfectly legitimate. On some of my prescriptions it has saved me up to 40%. But you need to ask before you use it because (and I don't understand why) sometimes it could cost more. So show your pharmacist the card and get a quote.
But I definitely agree with Karen. Feeling better is priceless. And if you are going to be reimbursed try using the needy meds and get it filled.