stomach problems related to imperfo

We brought our daughter (now 12) to see you about a year and four months ago because she had occasional severe stomach problems (serious diarrhea as a result of constipation). She had three different operations to cure her imperforate anus. Last year you prescribed Peglax, which seems to have made a world of difference. Thank you. My question is: she still suffers from this occasionally, although not nearly as often. She takes a teaspoon of Peglax a day. Is that the right amount? Thank you again.