Ans - It depends on the university; Still, many of the courses required for those degrees overlap. There are quite a few cross-listed courses that can be counted for any major. If you want to do pre-med then I wouldn't do a double major because pre-med itself is closer to a second degree (not really, but course load-wise).  I see your position as three heads and do not recommend it. I barely squeezed all my classes to graduate with my psych degree and pre-med concentration.