Stand up for yourself. Sit your parents down at the dinner table. Talk about their behavior and how it affects you negatively - your dignity, freedom, and very likely, your grades. Tell them that you love them and know that they care about you deeply. But you're all grown up now, and need your autonomy and independence.
Most parents are reasonable enough to start adjusting after they hear this from you. But if they won't budge then move out.
I agree with the above ^^^. The first 2 yrs of med school are miserable for all but elite students. Explain that you love your parents, but need a large amount of time to study all of the material so you can get good grades and a residency at a place like Harvard. Try to make time for them after tests and on breaks. They eventually will see your independence is not a threat. But definitely work on a comprise. Good luck and best wishes. Btw, my parents were quite eager to see me move on. Must be my sparkling personalityWow - very common issue. I won't repeat what others have said, although I agree. But I will advise that you tread carefully. It's likely that your parents have provided emotional and financial support over the years. Try to exit without burning your bridges. I think it's very realistic to tell them the amount of focused study and quiet Med School requires, means you need to be out on your own.
BTW - I love that book "Esperanza Rising"