I'd strongly warn against following this advice. Most schools report student enrollment to the National Student Clearinghouse (especially those who take out loans in any amount). As such, it would be easily discovered, should a medical school opt to look, that you attended a U.S. school you did not report. Even if they don't look during the application process, they'll be able to find out when you accept their financial aid package. This would almost certainly result in your dismissal from medical school -- even if they didn't find out until the end of your fourth year -- good luck getting in anywhere else after that.
Just be honest and be prepared to explain why you withdrew. Admissions committees understand that things happen, people have bad semesters, and they can bounce back. Unlike blakemd (who is rather new to SDN), I don't feel that withdrawing from a university is automatically going to set you back. It is, however, something you will need to be upfront about to keep it from diminishing the impact of your application.
Talk with a pre-med advisor. Maintain your focus on a career in medicine, if that's what you really want. And above all, don't lie. This is not an "opportunity for a fresh start."
Best,
-z