I studied 2 weeks for it, which is the worst idea ever. The NAPLEX is a test that tests BASIC knowledge with a wide range of random questions. The ONLY thing you should study for is the calculations. If you study a few hours for that, you should be fine. Out of the 185 questions, there are probably 20-30 calculation questions, but they count 30-40% of your overall score. They are weighted THAT heavily.
If I had to do it all over again, I would've just studied for calculations. I made a 118 on the test. If I just looked over all the calculations, I would have gotten at least 130+.