“…Importantly, although β-blockade and semiselective COX2 inhibition showed beneficial effects separately, their combined use was superior and, in some models, was the only effective approach; this was evident when the β-blocker propranolol was combined with the semiselective COX2 synthesisinhibitor etodolac. 12,22,33,66,67,84,89 Retrospective clinical studies have provided inconclusive results regarding incidental perioperative or chronic use of β-blockers, with several studies, [90][91][92] but not others, 93,94 reporting beneficial effects on long-term cancer outcomes, especially with respect to nonselective β-blockade. Perioperative COX inhibition also has provided inconclusive results, as recently reviewed by Cata et al 43 Notably, aspirin, a nonselective COX inhibitor, was recently recommended for the prevention of colorectal cancer (CRC) in men at risk between the ages of 50 and 59 years.…”