Completing the pre-med requirements is always a challenge, regardless of your major, since they require so many other classes – including classes which are only offered during specific times, and several labs which will devour entire afternoons each week. That said, because cognitive science affords a considerable amount of flexibility (e.g. in that there are very few specific courses that are required, in contrast to many other majors), many students in the past have found that this combination works well. (Of course, students in this situation should also run their full course plan by Yale’s Premedical Advising Office, which has considerable experience with such questions.)