HA! I have had a similar experience, but possibly worse!
Get this, I have a legit script for test. cyp. at walgreens from my MD. One day, this one-handed (yes, he had one hand and a hook on the other...) little twit of a pharmacist starts harassing me in front of other customers and my girlfriend. Starts going off about how I'm stupid for using it and it's going to kill me young, blah blah blah. I asked him where his medical degree was, and he instantly shut up...
You should have told him to "just shut up and HOOK me up with my meds" followed by looking over at the pharmacy tech and saying "can you give him a HAND - he seems to have a problem dispensing my script?".