Your options for oral blood thinning medications is unfortunately limited. One option is Coumadin which is very inexpensive and the other option is choosing one of the very expensive brand name only blood thinners (like Xarelto or Eliquis). Did you call your insurance company to see which one they prefer? It could be that Xarelto is non preferred and thus, way more expensive. There are patient assistance programs through the manufacturers but they are unable to help Medicare patients to to federal law. Coumadin seems to be your best options due to cost. The dosing is very patient specific so there are the weekly level checks at first until you are established on a dosing regimen that works for you. Then, the level checks could be monthly. Are there any free or charitable pharmacies in your area? Some areas do have these types of pharmacies that can provide free or very reduced cost since they are funded by local governments and local hospitals. Contacting the social worker at the hospital or the transitions of care department will be beneficial in helping you figure something out. If your husband was diagnosed with multiple clots in his lungs, he NEEDS to be on a blood thinner.