Not The Doctor

Patient: Why can't I have Flexeril? It's all just pain medication.
RN: Not really. See, Flexeril works in the brain stem and sends signals to your muscles to unclench. You told me your head hurts, which is probably not due to muscle spasms.  Tylenol stops your cells from creating these things called prostaglandins. Prostaglandins are protective, your body forms them when there's a problem, but they also cause pain. By stopping them from being created, Tylenol reverses the pain you feel. Like in a headache.
Patient: You're not a doctor.
RN:  You're right. I'm a nurse.

(stare down)

Patient: I think I'm having a muscle spasm now. Can I have my flexeril?
RN: (sigh).