The copay coupon is used after your insurance approved your prescription tooff set your copay costs. There are restrictions to qualify for the
coupon I suggest you look up Harvoni copay
coupon or Epclusa copay coupon. I believe the restriction has to do with Medicare or something. But in general the coupon is no problem to get all you have to do is ask on the site once you are approved by your insurance. Check out Harvoni copay coupon for the details.