I am taking harvoni, just started, and I take my first blood test in a week. I made a huge mistake and smoked pot for 3 days a week ago. I am really ashamed of myself for not having more control. Now I am really scared because someone told me if there is pot in my system when I take the blood test Medicare will cut me off the medication. I will never smoke it again and now I am worried that medicare will take it away and am scared to take the blood test. Does anyone know if it is only a one time drug test to get approved or do they test you everytime and will medicare cut me off now? I am scared to death, I am so blessed to be getting the medicine and now I feel extremely depressed and dissapointed in myself. Please help me.