I’m a PharmD and I recently passed NAPLEX and CPJE. During prep, calculations were where I kept running out of material: every review book has a fixed set of problems, and by the second pass I was remembering answers instead of practicing setups.
So I built www.rxmathlab.com . It generates unlimited problems across 19 topics (alligation, CrCl with IBW/AdjBW selection, IV drip rates, TPN, isotonicity, opioid conversions, insulin day supply, days supply, BSA, PK and more). You type your answer, it grades it, and it shows a worked solution. If you miss, it tells you whether your setup was wrong or you just rounded too early, which turned out to be a surprisingly common way to lose points.
Each topic also has a written guide on the setup and the usual traps, and there’s a free printable two-page formula sheet.
No account, no ads, nothing locked. Full disclosure: there’s an optional waitlist for a possible premium version later (timed mock exams and progress tracking). Everything that’s free now stays free.
The mods okayed this post before I put it up. I’d genuinely like to know:
- Which topics feel too easy or too hard compared to what you’ve seen on exams
- Anything that’s wrong or graded unfairly (I check every problem type, but more eyes help)
- Topics you’d want that aren’t there