How soon are biologics started for Crohn’s disease?

Question

Hello doctor,

I am 28 and recently had a colonoscopy that showed ulcerations in the terminal ileum, and a biopsy confirmed Crohn’s disease.

My CRP is 26, and my hemoglobin is 9.8, so I am also anemic. I was started on Azathioprine, but I have read about biologic injections being more effective.

When do doctors usually switch to biologics in Crohn’s, only if medicines fail, or at the start?
Is dietary modification, like low FODMAP, really effective in reducing flare-ups?
How often should blood tests like CBC and liver function be checked when taking Azathioprine long-term?

Please help.

Thank you.

Answer 1

Hi,

Welcome to icliniq.com.

I have gone through your query and understood your concern.

Your Crohn’s disease (chronic inflammatory bowel disease) treatment depends on the full clinical picture, your symptoms, blood tests, CRP (C-reactive protein), anemia status, stool markers, and scope or scan findings, not colonoscopy alone.

Azathioprine (AZA) is commonly used to maintain remission, but biologics such as Infliximab, Adalimumab, and Ustekinumab may be started earlier if the disease is severe, widespread, or if AZA does not control it well.

While taking Azathioprine, it is essential to monitor blood counts and liver function tests (LFTs) every two weeks for the first three months, and then monthly.

A TPMT (thiopurine methyltransferase) enzyme test is also advised before starting, as a small number of patients cannot metabolize AZA safely.

One important thing to remember is that diet cannot cure Crohn’s, but it does help control symptoms during flare-ups. Stick to low-residue foods (such as rice, pasta, eggs, chicken, and bananas) and avoid raw vegetables, nuts, and fatty or spicy meals.

In the long term, eat balanced meals with enough protein, iron, and vitamins. Sometimes supplements like vitamin B12, vitamin D, and calcium may be required.

Low-FODMAP works better for IBS (irritable bowel syndrome), but some Crohn’s patients find it helps with bloating.

You are not alone in this, and treatment is personalized. With the right plan, most people live full, active lives. So please do not worry.

Kindly follow my suggestions and get back to me with your results.

Thank you.