Thought I'd chime in since we're talking about knees. Have had 2 right and 3 left knee surgeries and need more. Was told I am too young for replacement although I'm in my late 40s. Also have an artificial disk in low back and recently had an intrathecal pump surgery which helps a little. Also have DDD throughtout mid-low back and arthritis.
Finally, had an MRI last week of my neck and apparently shows bulging disks there also. Going to try some facet injections and hope that helps with the neck pain.
Until then, as Gyp said, its smoke smoke smoke.
Anyway, best of luck to you in finding your meds. I'm sort of in the same boat but it takes time for prople to get to know you and what you're about. Safety first

MM