What if a patient on naltrexone is in acute pain?

This happened to me twice in the same month! One person to whom I had prescribed naltrexone knew very well that it blocks the effect of opioid medications, but simply forgot to stop it a few days before planned (elective) dental surgery. Acetaminophen 325 mg plus oxycodone 5 mg  (brand name Percocet®) was prescribed for…