I find that many practitioners (medical and dental) chronically underestimate what patients go through after procedures. I am a realist. I find many patients do very well and have minimal symptoms afterward, but I always make a plan to keep my patients as comfortable as possible.
I always suggest that patients take Ibuprofen (or Tylenol) one hour before their appointment and then again afterward for the next 24 hours.
Some teeth that need crowns have had extensive damage, some patients realistically do need stronger medications. In that case a Narcotic prescription is given.
I find that good communication before hand about what to expect, then for me to know my patient-i.e., are they going back to a 12 hour workday tomorrow, will they be on the phone and in meetings constantly the next day...? If so, it's better to plan for the worst, and engineer the results so that the tooth is as little irritated as possible.
Most people do very well with the crown process and like every other dental procedure, discuss your thoughts and questions with your dentist. DO it before you start so that you can plan properly. With a great plan, you will be comfortable and have no surprises afterward.