Is Dupilumab safe and effective for prurigo nodularis?

Question

Hi doctor,

I have been diagnosed with prurigo nodularis and have been struggling with hard, itchy bumps on my arms and legs that do not heal.

The itching is severe, and I often scratch until the skin bleeds. This has been going on for a long time and is significantly affecting my sleep and mood.

I have tried topical steroid creams and oral antihistamines, but they only provide temporary or minimal relief.

I wanted to ask:

What is the underlying cause of prurigo nodularis?
Is it related to allergies, immune dysfunction, or nerve-related itch?
I have read about newer biologic treatments such as Dupilumab (Dupixent). Is this an effective and safe option for prurigo nodularis?
Are there any long-term treatments that can help control the itch and prevent new lesions from forming?

This condition has become very distressing, and I would appreciate guidance on how to manage it more effectively.

Please help.Thank you.

Answer 1

Hello,

Welcome to icliniq.com.

I understand your concern. To help me confirm the diagnosis, I kindly request you to share clear images of the rashes.

If this does turn out to be prurigo nodularis, I would like to explain a few important points. Prurigo nodularis is a chronic inflammatory skin condition in which a person develops intensely itchy nodules, most commonly over the arms, legs, and trunk.

The exact cause is not completely understood, but in some cases it may be associated with underlying systemic conditions, particularly involving the liver or kidneys.

Because of this possibility, I would advise getting liver function tests and kidney function tests done. These are simple blood tests and help rule out internal causes that may contribute to persistent itching.

The itching in this condition can sometimes be severe enough to cause scratching, oozing, and excoriation, which may later result in dark pigmentation over the affected areas.

It would also be helpful to know if there is any family history of autoimmune diseases, especially if any first-degree family members are on long-term medications. In some cases, a skin biopsy may be required to confirm the diagnosis.

Regarding treatment, topical or oral steroids along with antihistamines often help control itching and inflammation initially. However, symptoms may recur after stopping steroids, and depending on the severity, your doctor may start oral steroids along with topical therapy.

For moderate to severe cases, biologic treatments are now available. Dupilumab is the first approved biologic for prurigo nodularis, but whether you need it at this stage should be discussed with your dermatologist. Other biologic options are also available.

Along with medical treatment, maintaining a disciplined lifestyle is important.

Try to eat a healthy.
Nutritious diet.
Follow a regular sleep schedule.
Exercise daily.
Ensure adequate vitamin D intake through diet and sunlight.
Practice stress management, as stress can worsen itching.

I hope this addresses your concerns. Please feel free to reach out if you need further guidance.

Thank you.