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Pearl · 05 of 05

Weigh the patient before you judge the drug

Before calling a JAK inhibitor a failure in an obese RA patient, account for BMI — the reduced response may be expected, and weight is a modifiable part of it.

Today's headline has an immediate bedside use: before concluding that a JAK inhibitor has failed in a patient with obesity, record the BMI and factor it into the judgement. A blunted response at high BMI is expected, not necessarily a reason to switch mechanism — and it is a concrete, shared reason to bring weight management into the treatment conversation rather than leaving it to a separate clinic the patient may never reach.

  • Record BMI as part of assessing response to a JAK inhibitor
  • A smaller response at high BMI may be expected rather than true drug failure
  • Use it as a shared, specific reason to address weight, not a generic instruction
  • Do not switch mechanism on a borderline response without accounting for BMI

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