Golimumab is from a class of Immunomodulatory drugs being used for RA and other autoimmune conditions.
Price is around 47k per injection.
Next Steps
It is not mandatory to take them untill the diagnosis is clear cut, not responding to regular treatment.
Knee pain and Tailbone pain can be controlled by regular medications, exercises and ice packs application.
Health Tips
Get yourself evaluated properly, if you are a genuine candidate for such drugs then go ahead , you will get improvement.