How is the cause of fever and fatigue differentiated in systemic lupus erythematosus (SLE)?

Updated: Aug 04, 2021
  • Author: Christie M Bartels, MD, MS; Chief Editor: Herbert S Diamond, MD  more...
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Answer

SLE-specific fatigue or fever generally occurs in concert with other clinical markers. Fever may reflect active SLE, infection, and reactions to medications (ie, drug fever). Always exclude an infectious etiology; patients with SLE are considered immunocompromised and are therefore at higher risk for developing infections and complications. Most infections are bacterial in origin, but clinicians should always consider the possibility of atypical and opportunistic infections, particularly when these individuals are receiving immunomodulating or immunosuppressive therapy. For example, prednisone doses higher than 15 mg/day and use of methylprednisolone pulses have been associated with increased risk of severe infection. [79]

Careful history taking may help differentiate between the potential causes of fatigue or fever. Note that an acute infectious process may also trigger SLE and that the two can occur concomitantly.


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