Other Vitamins and Minerals. Other nutrients can also help relieve muscle pains. A magnesium deficiency can cause muscle weakness and pain, while a lack of other B vitamins, like riboflavin, can also lead to muscle cramps and pain.
So my answer is that getting into medical school is pretty darn difficult. If you take a look at the medical school requirements page, you can see that I recommend a GPA of at least 3.5 and a MCAT score of at least 30. With these scores, you should have a chance to get into medical school. However, your chance for getting in also depends on the color of your skin.
How long is medical school? The answer to your question is four years. Medical school is unlike any other education you can possibly get. Out of the four years of medical school you should expect to spend your first two years in the basic sciences followed by two more years doing your your clinical rotations. You cannot become a doctor without first knowing the basics of medicine, hence the name.