In just jot hired at a CVS as a pharm tech with no certification or experience. The training consists of a bunch of HIPPA (privacy policies) and stuff on restricted products (PSE/E) which is only a part of the training due to some past violations and agreements apparently. After that you will also take online classes introducing you to the different pharmacy stations (drop-off, pick-up, drive through, production) and attend 2 "classes" which they repeat the same crap over again that was in the training video. Finally you will be able to do the on the job training in which you watch a guy do half of a transaction and walk away and then you training is complete and you are on your own. The videos cover the basics but don't cover the random problems that every third customer has. Basically you learn the bare bones from 3 hours worth of training videos (which 50% of the videos focus on customer service and not the actual work) and you learn the rest by asking constant questions for the next 6 months.
As far as learning anything about drugs absolutely nothing was included in the training other than the fact that PSE/E is used to make meth and c2's like oxy have to be handled by the pharmacist
Within your first year of working you have to pass some kind of state exam due to an Emily law. They offer another wonderful online training class for this. As far as the PCTB exam absolutely nothing has been mentioned. In my state it is not required which might be why.