... injection for AS, and PA. This is my reaction to using the drug, the first week of using the medication I do not get any relief the second and third week I feel great, almost pain free. The last week I am constant pain. I am wondering if anyone else out there does not get a full month of relief from this medication, I only get relief for two week out of the four. If you have this problem what change if any in your medication addressed this issue i.e. larger dose of medication or more frequent injections