My dad is experiencing pain in his left knee from past 4 days but today it's so severe that he is not able to walk we consulted an orthopaedic doctor 2 days back and he prescribed these medicines 1.lorchek p tab 2.ultracet tab 3.rabiros 20 mg tab 4.mega freeflex tab 5.orthosenz ointment Even after taking these tablets from two days there is no improvement and his pain has increased severely.