Personally, I saved those courses till my spring semester. It depends though... if they are your major courses it may look bad but free electives dont matter much I think. During my MCAT semester I took an introductory culture class and philosophy of star trek (an introductory which sounded easy but actually was very hard). If you need a GPA boost (who doesnt?) then I would say do it.
No medical school ever asked me about any of my courses. I think they care mostly about BCPM and overall GPA.