The proper way of treatment is not just medicines but lifestyle change as well which means diet change and other supplementation.
Your knee does seem to show some early stages so better to go for a complete course of treatment than just few free consults on this open forum.
Next Steps
This is only for your benefit because it seems like a condition that has been developing due to lack of certain nutrition in your diet.
Health Tips
One dose or few doses of medicines are not magic.
Disease occurs after many years of body's struggle of trying to keep healthy but eventually succumb to the disease.
So if you decide to go with the medicine course, be patient and be open to your doctor and have trust.