RT Journal A1 Kuehn BM T1 Fda warning: Remove drug patches before mri to prevent burns to skin JF JAMA JO JAMA YR 2009 FD April 1 VO 301 IS 13 SP 1328 OP 1328 DO 10.1001/jama.2009.406 UL http://dx.doi.org/10.1001/jama.2009.406 AB The nonadhesive backing of some drug patches contains aluminum or other metals that may become heated during an MRI. Many labels for such products already warn of such a risk; however, the FDA was recently alerted that Teva Pharmaceutical's fentanyl transdermal system lacked this warning. Further investigation by the agency revealed that a warning is also missing from the labels of a variety of other medicated patches.