Best 5-ASA for terminal ileum and colon

I was doing some research and found that

Drug Site of release Usual dose
==== =========== ==========
Asocol Ileum and colon 800-1600mg two to 4 times daily
Pentasa Small bowel and colon 1g three to four times a day

My 8 year old daughter has inflammation in her terminal ileum and her colon. SHe is currently on Pentasa 1.5 gms a day and some times takes Rowasa. Is this the correct medication for her? Her inflammation is just ileum and colon. That would mean that Asocol would have been the better medication instead of Pentasa which releases throughout small bowel and colon as asocol would release in ileum and colon where her inflammation are found. I'm concerned that Pentasa is releasing medicines in wrong areas and not where it is needed most.

Is her Pentasa dose ideal for her age and weight? What is the usual dosage of Pentasa for pediatrics? Do you think she is getting correct dosage of Pentasa?

Post Edited (kamakya) : 3/3/2014 7:14:38 AM (GMT-7)

@kazbern. Thanks for the info. I have an appointment with him on Thursday. I will not bring this topic then. He has been saying that he will switch to 6MP if a flare happens next time. If he brings the topic of 6MP, then I would ask him to try asocol.

My daughter is currently tapering Prednisone, but last two days we saw some minor blood stains in her stool.We got alarmed as my GI will change her to 6MP with no 2nd thoughts.

We are giving rectal enema every 3rd day or when ever we see blood stains in her stools. Her Ped GI seems very reluctant to give on a daily basis as he tells that it will exceed per day dosage of mesalamine.