Serum sickness-like reaction in Adult
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Synopsis

Eosinophilia may be present, but unlike true serum sickness, immune complexes, hypocomplementemia, and vasculitis are not found. Most reactions are mild and self-limited and resolve within several days to weeks after drug withdrawal.
Antibiotics, particularly cefaclor, penicillins and sulfonamides, NSAIDs, propranolol, and carbamazepine are among the most frequent offenders.
Codes
T80.69XA – Other serum reaction due to other serum, initial encounter
SNOMEDCT:
403608009 – Serum sickness caused by drug
T50.905A – Adverse effect of unspecified drugs, medicaments and biological substances, initial encounter
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Last Updated:08/06/2025