Students should be aware that most med schools will not give specific feedback to unsuccessful applicants. Most advice will be generic. (Improved your GPA. Raise your MCAT score. Increase your volunteer hours.) Admissions officers cannot discuss the contents of LORs.
Also unsuccessful applicants are strongly advised AGAINST doing back-to-back application cycles. Med schools advise students to take a full year off (or more) to strengthen their application between cycles.
A number of medical schools offer advice for reapplicants–
University of Miami Miller School of Medicine
http://admissions.med.miami.edu/md-programs/general-md/reapplicants
Roughly 20% of the students who apply to the University of Miami Miller School of Medicine in any given year are reapplicants. Data that we have collected indicate they have a lower acceptance rate than do first time applicants
University of Wisconsin School of Medicine and Public Heath
http://www.med.wisc.edu/education/md/admissions/reapplying/31716
There should be significant improvements in your application before reapplying. This might mean not reapplying the very next year. The most common error made by reapplicants is that they submit their next application too soon.
The Ohio State University College of Medicine
https://medicine.osu.edu/admissions/md/tips-and-advice/pages/index.aspx
To maximize the chances of giving off this perception, you must allow enough time before reapplying. This will undoubtedly be the hardest part of the process, but be patient; if you rush it, you may join the ranks of those who are applying for a third time.
University of Minnesota Medical School
https://www.med.umn.edu/admissions/how-apply/re-applicant
Though you can submit a second application immediately after your first application, you may want to consider waiting a year if you feel you need more experiences that help you demonstrate the essential and desired qualities of an ideal medical student.
University of North Carolina, Chapel Hill
https://www.med.unc.edu/admit/requirements/reaaplicants/
https://www.med.unc.edu/admit/requirements/our-ideal-candidate/
Virginia Tech Carilion School of Medicine
http://medicine.vtc.vt.edu/admissions/re-applicants/
LSU Health Shreveport
http://www.lsuhscshreveport.edu/Education/som/admissions/reapplicants/index
University of Missouri
http://medicine.missouri.edu/admissions/nontraditional.html
East Carolina University, Brody School of Medicine
http://www.ecu.edu/cs-dhs/bsomadmissions/whatif.cfm
SUNY Upstate
http://www.upstate.edu/com/admissions/reapps.php
Applicants are discouraged from reapplying unless their qualifications have significantly improved.
Texas College of Osteopathic Medicine (UNTHSC)
https://www.unthsc.edu/texas-colleg…ants-home/common-mistakes-made-by-applicants/
Michigan State University College of Osteopathic Medicine
http://www.com.msu.edu/Admissions/Guidelines_For_Success/Reapplication.htm