Which RA treatment is the third step in the sequence (after NSAIDs or MTX; MTX + TNF)?

• A. NSAIDs or MTX
• B. MTX + TNF
• C. MTX + Jak
• D. MTX alone

Answer: (C)

The question is about how RA therapies are escalated when response is not adequate. The idea is to move to a different mechanism of action after starting with NSAIDs or MTX, and then adding MTX to a TNF inhibitor to boost control. The next logical step introduces a different pathway by adding a JAK inhibitor to MTX. JAK inhibitors block intracellular signaling for multiple inflammatory cytokines (such as IL-6 and others) that drive RA, providing additional disease control when TNF inhibitors alone don’t achieve the desired response. They’re an oral option that can be used alongside MTX and are particularly helpful when TNF-based therapy isn’t sufficient or suitable.

So MTX plus a JAK inhibitor is the appropriate third step because it represents a shift to a different mechanism of action after MTX with TNF therapy, aiming to intensify control of disease activity. The other options are typically earlier or later steps in this sequence: NSAIDs or MTX are initial approaches, MTX plus TNF is the preceding step, and MTX alone is a less active strategy once combination therapy has been tried.