A hospitalized patient developed persistent fever despite clinically improving from the original infection. Cultures remained negative, inflammatory markers were not rising as expected and there was no new localizing symptom.
The reflex response was to consider another antibiotic escalation.
The missing review
The team reconstructed the timeline carefully: when did the fever begin, and what had changed immediately before it?
The fever started shortly after a new medication was introduced and disappeared after it was withdrawn.
The diagnostic twist
Drug fever is a diagnosis of exclusion, but the case illustrates a broader principle: persistent fever does not automatically mean uncontrolled infection.
Clinical pearls
- Review the medication chart in unexplained fever.
- Reassess cultures, devices, thrombosis, inflammatory disease and other noninfectious causes.
- Antibiotic escalation without a new hypothesis can create harm.
- The timeline is often one of the most powerful diagnostic tools.
Take-home message
When the fever persists, read the drug chart as carefully as the culture report.
Educational note: This is a fictionalized/composite teaching case created for clinical reasoning. It is not a record of an identifiable patient and is not a substitute for local protocols, specialist advice or patient-specific clinical judgement.