Are PhD studies in molecular science possible following revoked RN license due to drug use (fired, but no criminal charges)
I have no domain-specific expertise here, so take this answer with a grain of salt. But broadly speaking, having been fired from one’s job at some point in your life is not an obstacle to getting into a STEM graduate program in the US (and I’m sure most countries). I’m not aware that it’s even required to report such things in your application anywhere. And I’m not aware that PhD programs do background checks on their applicants. No program that I am familiar with does.
So yes, a job in health care involving care of patients may be more problematic, but at least a science PhD seems well within the realm of possibility.