Suggest Remedy For Chronic Pain In Knee Joint

my name is Gupta I am a vegetarian, i have knee joints pain problem, my nature of job is mechanical engineer field work, as per my blood reports i have B12 and D3 deficiency, now i am not using any medicine, only physiotherapy exercise . i spoke to Knee specialist Doctor , He said No medicines required only exercise can cure the damage between the knee joint. I want medicine and would like to take another Doctor opinion , Now day by day my knee problem increasing ,please give me your best suggestion. can i use Cartigen Forte tablet.