My child, Hannah was on Creon 5 from the age of 1 year old, up until one month before her 4th birthday. When we ended Creon 5, she was up to 2-3 Creon 5 for meals, and 1-2 for snacks.
She now takes Creon 10, and was taking 2-3 for meals, and 1-2 for snacks, until a little over a week ago. I asked that same exact question to the doctor while she was in the hospital for her first-ever "tune up"...(he couldn't believe she was 5 years, and almost 2 months, and had never had a tune up until then)...we didn't actually bring her in for a tune-up...we brought her in, because of a fever, and lots of coughing...we found out she had pneumonia in her right lung, so she stayed 8 days for a tune up. He upped her Creon 10 to 4-5 for meals, and 3-4 for snacks...I expressed to him that I had been concerned for a while because of oily looking stools, and she didn't really seem that she was gaining weight. She's gained 3 pounds 2 ounces since she was released from the hospital 8 days ago.
So, you may want to ask her CF doctor about it, to be safe.
Rebecca, (Hannah's mom) Hannah, age 5 w/CF