I wondered the same, but as far as I can tell, medical marijuana is essentially considered the same as regular marijuana once it's purchased and taken out of the store.

IIRC, the "prescription" definition for medical marijuana was just a way to work it into the then-state regulated Board of Pharmacy portion of getting a license. Since the state subsequently dropped the requirement of a patient registering with the state to get a card from them, I don't think it'd be the same as giving someone your prescribed medication from a regular pharmacy.