Precaution: Take my words with precaution, I'm also a pre-med and I've given wrong info before.
The English requirement varies greatly by schools.
Some schools do not specify that you have to take any composition. Some will specify that.
Few schools (not all) place English under Humanities. I believe it's any English courses then.
Some don't accept AP.
You have to do your research later on; I've bought MSAR and it's all confusing. Every school has their own unique requirements. Pick schools that you know you are going to apply, then try to fit their standards along with the basic one year of BCP(Bio,Chem/Ochem,Physics).
I've taken Psychology, I'm taking Philosophy now and I will be taking Sociology... all because there are schools out there that wants Psychology/Sociology ... also Philosophy or Ethics (aarrrrrggghh).
I'd say take at least one composition course. I've done that, I've taken one composition course along with two other English courses outside of composition. (One Lit and one Critical)
Also see UC Berkeley's advice for Pre-Med:
Requirements can vary. To ensure eligibility, we recommend taking 1 year of English or other writing intensive courses.
Most students fulfill this medical school requirement by taking Reading and Composition (R&C) courses at Berkeley.
Taking two R&C courses is your safest bet- even if you have placed out of them with AP credit. These are our writing intensive courses at Berkeley and will satisfy the one-year requirement that most medical schools have. If you did not (or choose not to) take any R&C courses, we recommend looking into classes from the following departments: English, Rhetoric, Comparative Literature, and the College Writing Program.
source:
https://career.berkeley.edu/Medical/PrepPrereq
Also see here:
https://www.cc-seas.columbia.edu/sites/dsa/files/handbooks/Medical School Requirements FINAL.pdf
Some of them have changed, so check out the individual links.