On our son's, Brendan's, death certificate, under cause of death, it says, "Adverse reaction to fentanyl." January 24, 2021 Heather Arata https://digital.olivesoftware.com/Olive/ODN/PhiladelphiaInquirer/shared/ShowArticle.aspx?doc=PHQP%2F2021%2F01%2F24&entity=Ar02301&sk=B17C5927&mode=text