two completely different fields it depends on your interest but KEEP IN MIND one thing if u learn Medicine you Will become a Medical Doctor after graduating...... if u pursue CS you become a dude who just got in college..... wt i mean by that is, if u choose CS u need to learn almost everything by yourself because the field is so infant they don't even knw what they are teaching u..... if u r someone who likes to learn by himself definitely go with CS.....if you want a field that guarantee u a profession go with Medicine.