I passed the CPHON last week after 12 weeks of studying. I've been a pediatric oncology nurse for 5 years, which definitely helped with the clinical content, but there were sections on late effects and survivorship that I hadn't focused on much in my day-to-day work.
I studied about 1 hour on weekdays and 3 hours each weekend day, which adds up to roughly 125 hours total. The APHON study guide was my main resource — I went through it twice. I also used the practice questions in the back and tracked which content areas I got wrong each time to find my weak spots.
The chemotherapy administration and toxicity section carried a lot of weight, which wasn't surprising. What surprised me was how detailed the questions were on pediatric palliative care and symptom management — not just the clinical protocols but the communication and family-centered care aspects.
My biggest regret is not starting practice questions earlier. I spent the first 6 weeks just reading and should have mixed in active recall from week 2. If you're studying now, start with at least 20 practice questions per session from the beginning.
125 hours sounds about right for someone with your background. The extra time on palliative care paid off for me too — those questions are nuanced and the wrong answer is often just slightly off in a way that's easy to miss.
Do the APHON practice questions multiple times until you can explain why each wrong answer is wrong, not just why the right one is right. That mindset shift improved my practice scores about 9 points.
The late effects content is easy to underestimate because it's not front-of-mind in acute care. I made a table of all major treatment modalities and their associated late effects — that probably covered 10 to 12 questions on my exam.
How did the pharmacology questions compare to what you studied? I'm 6 weeks out from my exam and worried I'm not going deep enough on the drug mechanisms.