Mrs. Rahma's Knee Dilemma

You are a doctor on duty at a polyclinic.

In the patient's chair sat Mrs. Rahma (65 years), her face was grimacing while holding her right knee. "Doc, my knee hurts a lot because of this calcification. My neighbor said that taking Glucosamine supplements is really effective. I just want to ask for a prescription for that, is that okay, Doc? I'm afraid of taking pain medication all the time."