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Case report
Thrombocytopaenia: a serious side effect of diazoxide
  1. Kirsten A Thus,
  2. Wilhelmina J den Boogert and
  3. Josefine C van der Heyden
  1. Paediatrics, Franciscus Gasthuis en Vlietland, Rotterdam, The Netherlands
  1. Correspondence to Dr Josefine C van der Heyden, j.vanderheyden{at}


A 2.5-year-old boy with a history of (transient) congenital hyperinsulinism was admitted to the paediatric ward with recurrent hypoglycaemia. Diazoxide 5 mg/kg/day and hydrochlorothiazide 2 mg/kg/day were initiated. After increasing the dose of diazoxide to 10 mg/kg/day, the child developed mild rectal bleeding, petechiae, epistaxis and haematemesis. Blood screening showed severe thrombocytopaenia. Diazoxide and hydrochlorothiazide were stopped, and his platelet count normalised. Drug rechallenge was positive. Drug-induced immune thrombocytopaenia was diagnosed.

  • Paediatrics
  • Pharmacology And Therapeutics
  • Haematology (incl Blood Transfusion)
  • Endocrinology
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  • KAT and WJB contributed equally.

  • Contributors KAT: selected the patient and contributed to writing the manuscript. WJB contributed to writing the manuscript. JCvdH contributed to patient selection and supervised writing of the manuscript.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Competing interests None declared.

  • Provenance and peer review Not commissioned; externally peer reviewed.

  • Patient consent for publication Parental/guardian consent obtained.

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