Let's say you took some AP courses in high school, and earned a 3, 4, or 5 on the AP exam.
Depending on the college you attended (some only award credit for a score of 5) you would have to take the action to ask the college/registrar to award you college credit for your AP performance.
If your college does award you credit, it is best if they give you a specific number of hours in a specific category.
Example: you earned 5 on the AP Chemistry exam and your college transcript now says "Gen Chem 3 hours CR"
CR stands for credit by exam and you don't get any ABC grade connected with the course.
This would be enough credit for 1 semester of an entry level Chemistry course.
If you never asked to be given credits for your AP courses, but had just taken them to look good on your application to college, credits won't appear on your college transcript.
It's up to you to read the rules each medical school uses regarding AP credits.
Using the 3 AP Chem credits as an example, some med schools might take that for 3 Lecture hours, but expect you to take a college level Chemistry lab in person.
Baylor College of Medicine, for another example, does not accept AP credits for any of the math, chemistry, physics, organic chemistry, biology, or English courses because they want you to learn those at a college level of instruction.