https://pubmed.ncbi.nlm.nih.gov/25579346/
“Graphene oxide: a carrier for pharmaceuticals and a scaffold for cell interactions” 2015
” More recently, graphene oxide has been extensively explored for drug delivery applications. An important increase in research efforts in this emerging field is clearly represented by the hundreds of related publications per year, including some reviews. Many studies have been performed to explore the graphene oxide properties that enable it to deliver more than one activity simultaneously and to combine multidrug systems with photothermal therapy, indicating that graphene oxide is an attractive tool to overcome hurdles in cancer therapies. “
It can be effective , especially on tumors unresponsive to other treatments.
Of course, the alternative to treatment is to become a cancer fatality in a horrible death so there is a different risk reward trade space on that one