Analgesics awake the sleeping/cancer-protecting angels in mutant p53-expressing human tumors: Tramadol (brand name: Ultram), an analgesic, increases the expression of tumor suppressors genes, such as HNF4α, CADM2, p53, TAp63, TAp73, INK4a/ARF, and others, and induces regression of p53-mutated human tumors, via down-regulation of its target gene, 18/October/2018, 5.18 am