I have been on Tykerb for nearly 3 years and have been fortunate enough to pay just a $15 co-pay each month. Because I've been on SSDI for two years on December 1st, I now have to have Medicare A & B instead of our private insurance that includes prescriptions. It seems that all the Part D prescription plans have the $4500 donut hole and even after I pay the $4500, it will cost me thousands more each year (notice how optimistic I am that I will be around for YEARS!) to pay for Tykerb. Does anyone else on Tykerb have a Part D plan? If so, are there any plans that make Tykerb affordable? Thanks.