A case of overdose via tattoo

Transdermal fentanyl patches are used frequently for the management of both acute and chronic pain. Adverse events with their use, in particular overdose, are not uncommon. We describe a case of fentanyl overdose from transdermal patch placed over a five-day old tattoo. The report will review the pharmacology of transdermal fentanyl and the physiology of tattooing, as well as the potential link between the two, which may have lead to the overdose.