Suggest Better Treatment For Knee Pain

I HAVE RIGHT KNEE PAIN WHICH BELOW THE KNEE CAP.IT PAINS ON MOVEMENT AS WELL AS WHEN KEPT STILL WHILE SITTING. I HAVE TAKEN PAIN REDUCERS BUT OF NO RELIEF. I HAVE SHOWN TO A LOCAL ORTHO DOCTER. HE GAVE ME GLUCOASMINE AND SOME ANTIBIOTIC AND PAIN KILLERS.PLEASE HELP'