Just to say, I completed two years of English Lit before leaving and I am now applying as a mature student for medicine, and one of my choices was the original university.
I have never made it a secret - it is right there in my personal statement and educational history that I dropped out and didn't enjoy the course. I have been offered two interviews - it doesn't seem to affect things (though just wait until offers come out and I don't get any...).
Lying about it is really stupid, and you are missing an opportunity to say why medicine is right for you - that whilst biomed/whatever is incredibly interesting, it does not give the opportunity to communicate and help people on a very personal and intimate level.