I received a call last week where Medco informed that they will not fill my valcyte, valtrex or doxycyline anymore. The reason they gave me for the valcyte and valtrex was it was a drug not approved for my illness. I have heard of that before, but don't understand why they did it for 3 years and then suddenly stopped it. The other really shocked me. They said I had been on doxycyline for 2 years and could become resistant to the drug. I have a severe mycoplasma infection and my labs still show an infection. He said they would not fill it. Any ideas?