I have a headache and need Tylenol.
Why do you have a headache?
I drank 750ml of bourbon last night.
The issue is not the Tylenol in this case, but that you are contravening CARS 602.03
Alcohol or Drugs - Crew Members
602.03 No person shall act as a crew member of an aircraft
(a) within eight hours after consuming an alcoholic beverage;
(b) while under the influence of alcohol; or
(c) while using any drug that impairs the person's faculties to the extent that the safety of the aircraft or of persons on board the aircraft is endangered in any way.
The hangover means you are under the influence therefore you are not fit to fly. The Tylenol has nothing to do with the issue.
So the Doc would suggest that you not fly for that reason. And that is why Canada is actually a better system than a master list.