A 62-year-old woman with a history of end-stage renal disease on haemodialysis, essential hypertension and type 2 diabetes mellitus was diagnosed with sepsis and placed on 600 mg oral linezolid every 12 hours and 1 g intravenous ceftriaxone every 24 hours. Blood cultures grew Streptococcus dysgalactiae, and she was switched to intravenous ceftriaxone 2 g daily. Platelet counts slowly trended down after starting ceftriaxone reaching 5 K/μL on day 12 of treatment. Ceftriaxone was discontinued and heparin-induced thrombocytopaenia was ruled out. She was switched to vancomycin and her platelet count improved. Given the temporal relationship between changing platelet counts and starting and discontinuing ceftriaxone, a diagnosis of drug-induced thrombocytopaenia was made.
- haematology (drugs and medicines)
- unwanted effects / adverse reactions
- drugs: infectious diseases
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