In lengthy grad programs, I think almost everyone probably quesitons their career decision at some point. IMO, the best way to be sure you made the right choice is to do plenty of shadowing beforehand and are dedicated to work hard in your studies.
We had a couple people from my school who left and went into various other allied health programs (dent, Carib med, PT, etc). While some may have been by choice, it was usually for academic reasons (failed course, dismissed etc).
Yes, I totally agree that almost everyone starts questioning their career decisions at some point (especially when stressing out during exam time

). But make sure you think things through carefully, and do tons of research and shadowing before you make your choice to change.
I know people who change professions and withdrew from their schools with very good reasons, and find themselves more capable working as a surgeon/physician in podiatry than their previous profession (ie. pharmacy, dental) and I know some going into dental after being in optometry school. While it is true to some extent that the admissions requirements for podiatry schools are considered low, it is still a long program and you have to stay committed to it, or else you're just going in circles and constantly changing careers and wasting money.
If you're changing careers based on academic failures, and what not (not sure how this works with admissions), but I know admissions committees do check, request for your transcripts, and a letter of intent or something from your school's dean proving that you weren't dismissed from the school. Something to keep in mind. It's more important that you find the right fit for you and commit to the program and get through it.
👍 ...Because you can't escape the hard work, studying and exams.
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Everyone's going to regret or have doubts at some point in their lives, but make sure it's a profession you are capable in and can see yourself in. I know it took me firsthand experience to realize something wasn't for me anymore. Like everyone's saying, shadow, shadow, shadow.
I do not believe I have made a wrong switch in professions for myself, but I could always have doubts later on in the podiatry program when I am upset or stressed out. This will happen regardless of profession, job, education, etc. but podiatry is a good profession and growing, and it's what we make of it in the future. Good luck!
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