There are a remarkable number of offenses that you will not necessarily lose you license over, depending on the state you work in, although you may get your license suspended or be put on probation.
PLEASE DON'T drink and drive because you are putting the lives of innocent people in jeopardy when you get behind the wheel after you've been drinking. Not to mention your future. A regular old DUI may end up with a suspension of your license, but if you kill someone, you are looking at jail time and probably losing your license. And either one could happen at any time...
In healthcare in general, the offenses which are most serious are those such as abuse of the elderly, assisting suicide, etc. I don't know about pharmacy though.