Was passing a kidney stone once. Sent up for an IVP with order from the ER MD for morphine 5 mg IV at patient's option. As the contrast media for the IVP was given, the initial dose wore off, leaving me in agony. The nurse refused to honor my call for the morphine, and had the temerity to suggest that I was a junkie! I got up off the table, put my hands around his throat and gave him a simple choice. His IQ immediately doubled and he made exactly the right decision.
That is exactly what I am talking about. :-) Switching meds is not innocuous. It makes the patient...shall we say...irate??