Standard Dosing Schedule for Remicade in Ulcerative Colitis
Remicade (infliximab) is given as an intravenous infusion for moderate to severe ulcerative colitis in adults and children 6 years and older who haven't responded to other treatments. The typical schedule starts with three loading doses: 5 mg/kg at week 0, 5 mg/kg at week 2, and 5 mg/kg at week 6. Maintenance doses of 5 mg/kg follow every 8 weeks starting at week 14. Some patients need dose escalation to 10 mg/kg if response weakens.[1][2]
When Doctors Adjust the Schedule
If a patient loses response or can't tolerate 5 mg/kg, providers increase to 10 mg/kg or shorten intervals to every 4 weeks. For pediatric patients, dosing is weight-based (5 mg/kg initially, potentially up to 10 mg/kg), with the same loading and every-8-weeks maintenance unless adjusted. Treatment continues as long as benefits outweigh risks, often for years.[1][3]
How Long Until It Starts Working
Remicade often improves symptoms within 2-4 weeks after the first doses, with full clinical response by week 8. Infusions last 2 hours in a medical setting, and patients are monitored for reactions.[2][4]
Common Side Effects During Treatment
Patients report infusion reactions (fever, chills), infections, headaches, and fatigue. Long-term risks include serious infections, lymphoma, or heart failure—doctors screen for tuberculosis before starting. Not everyone responds; about 60-70% achieve remission initially.[1][3]
Differences from Crohn's Disease Dosing
Remicade dosing is identical for ulcerative colitis and Crohn's—same loading and maintenance. It's approved for both, but ulcerative colitis trials showed 45% mucosal healing at week 30 with 5 mg/kg every 8 weeks.[2][4]
Alternatives if Remicade Isn't Enough
Biosimilars like Inflectra or Renflexis follow the same schedule at lower cost. Other biologics (Vedolizumab/Entyvio every 8 weeks IV, or Ustekinumab/Stelara every 8-12 weeks) or oral options (e.g., JAK inhibitors) may replace it if ineffective.[1][5]
[1]: FDA Label for Remicade
[2]: Crohn's & Colitis Foundation - Remicade Dosing
[3]: UpToDate - Infliximab for IBD
[4]: Mayo Clinic - Ulcerative Colitis Treatment
[5]: Drugs.com - Remicade Alternatives