I doubt u would even get a solid answer out of the PA BON. Even ifu got it in writing, i wouldnt trust them honestly. I suffer from extreme back and nerve pain, am a nurse in PA also. At first, i thought MMJ maybe the way to go until i heard what another state did without warning to their nurses (it was either CT or VT, I think). That states Medical MJ system is set to ping the nursing board, it notifies the BON the moment a nurse in their state gets a MMJ card and they automatically REVOKE THEIR NURSING LICENSE! To my knowledge that state did not send out any notification on new policy saying such would occur. I have a non nurse friend in PA that researched PA MMJ, and u cant buy guns, get a conceal to carry permit, and an array of other things.
But that said, it is ur life that u could be saving! The best that i would suggest in ur case is to find a attorney in PA to talk to, but they may not know much either as MMJ is new to PA. I will be praying 4 complete healing in Jesus name!