I Have Received Synvisc 1 Injections Every 6 Months For

I have received Synvisc 1 injections every 6 months for a number of years. I was switched to Orthovisc which needs 3 injections which did not work on my knees. I was then switched to Monovisc which I have currently. I am not getting relieve from Monovisc and it has been suggested that I switch again to a more effective injection Supartz Sodium hyaluronate which requires 5 injections. Confusion prevails, any suggestions?