Hi, !
I think few things are quite as annoying as being in the "is this med working for me or not?" guessing game. I know other members of this community gave expererienced this situation and I hope they see your comment and chime in. I would definitely make note if you are noticing more of the "I don't feel any better after my infusion" moments and let your doctor know. Continued decrease in efficacy may be a sign that Inflectra is no longer working well for you or you might need an increase in dosage (if possible).
Our bodies are so complex, even without an autoimmune condition thrown into the mix, so it's anyone's guess as to why an infusion seems to work one time and not as well the next. So, I can't offer any helpful insight into the "why" behind this issue.
Most posts on this subject are from members that are experiencing a noticeable decline in the positive results they are seeing after infusions, which may not be exactly what you are referring to, so I didn't want to share a bunch of links to articles that might not be helpful for you. I will share this one article about figuring out when it might be time to consider switching treatments, just in case you find yourself pondering that question any time soon -- https://rheumatoidarthritis.net/living/time-to-change-your-treatment. I hope your next infusion brings you a noticeable decrease in RA symptoms and if not, don't hesitate to let your rheumatologist know!
Best, Erin, Team Member.