Hey man- I think its a good question. With hundreds of drugs out there its almost impossible to know dosage regimens for all of them. For the Naplex its best to be familiar with some of the most commonly prescribed meds. Know what a high or low dose for some of the MORE common drugs associated with the MOST common disease states looks like, i.e diabetes, HTN, cholesterol. You may want to be familiar with max doses for some meds as well.
If your going to sit there and try and memorize regimens for gen 1 antipsychs or MS meds your probabley going to be wasting your time. Alot of the info on doses you probabley would have picked up from working.