Like so many things helicoptery, it is possible but think about why you are doing it! If it is making a point to an FI student, then it has value but flying left handed from the right seat as a matter of course is not a good idea. Better hope you don't have an engine failure when your left hand is on the cylic and you are writing stuff down with no collective to your right.
Throttle is the biggest problem as reactions in unexpected situations can be incorrect; for example:
An FI student on the course before me went out to start up from the left seat before the FI instructor joined him. Being slightly unfamiliar, he decided to use the collective on his right rather than the one on the left, left hand was on cylic. He checked throttle (in his right hand) was wound towards him as he normally did when using his left hand, unfortunately right handed meant that it was fully open. What a surprise, there was a MASSIVE overspeed and he could not "close" the throttle as it was already fully closed in his mind. Very costly and completely unnecessary.
Like may things you read on PPRUNE, ask yourself the question "How would I justify doing this" when standing up in court following a prang. If you can't make a reasonable case to yourself, its unlikely that you could convince a jury.