 [ Symptoms ] what if i am a night owl [ Disease ] no effient does not work by inhibiting vitamin k so there is no reason to change your diet when taking it yes he does his doctor should advise him my doctor suggested that if i eat any leafy green vegetables make it very little and only once in a great while and say only once a month leafy green vegetables have vitamin k in it vitamin k have a natural blood thinner in it it is not consistant how your body absorbs it blood thinners are the only safe way to go