My son was diagnosed with Crohn's last August at age 7. He is now 8. We have tried 6MP with liver and bile duct complications. He was then put on Pentasa (which seemed to have worked great symptom-wise) but he only lasted 3.5 months before he had his 2nd flare. Because of his short remission and high inflammatory markers, his GI wants to try Methotrexate. The side effects are scary. I was intersted to hear back from those who have used Methotrexate, esp. by those who have young children. Thank you.