Letters Transdermal testosterone gel

Don’t take blood from the arm where gel is applied

BMJ 2010; 341 doi: https://doi.org/10.1136/bmj.c4014 (Published 27 July 2010) Cite this as: BMJ 2010;341:c4014
  1. Hisham Nizar, registrar in clinical pharmacology1,
  2. Anjali Balasanthiran,
  3. Daniel Morganstein,
  4. Bernard Norman,
  5. Kevin Shotliff
  1. 1Chelsea and Westminster Hospital, London SW10 9NH
  1. nnizar{at}nhs.net

    Mason and colleagues report that sexual precocity occurred in a 4 year old boy with inadvertent transfer of transdermal testosterone gel.1 We report contamination of blood samples during venepuncture.

    A patient receiving testosterone replacement treatment had a serum …

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