CIDP is an acquired autoimmune disease where the immune system attacks the myelin sheath around peripheral nerves. This disrupts nerve signal transmission, causing progressive weakness, numbness, and tingling that typically affects both sides of the body symmetrically. Unlike Guillain-Barré syndrome (GBS), which is acute and self-limiting, CIDP is chronic and requires ongoing treatment.

What is the difference between IVIG and Vyvgart Hytrulo for CIDP?

IVIG floods the system with pooled antibodies that modulate the immune system — given as a 4–8 hour infusion every 3–4 weeks. Vyvgart Hytrulo blocks the FcRn receptor, accelerating degradation of pathogenic antibodies. Given as a weekly home injection (~90 seconds). The key advantage is independence from infusion centers. The ADHERE trial showed 61% vs 20% maintained clinical improvement vs IVIG.

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CIDP — Chronic Inflammatory Demyelinating Polyneuropathy

CIDP is a rare autoimmune neurological disorder causing progressive weakness and sensory loss from immune-mediated destruction of myelin sheaths around peripheral nerves. Historically treated with IVIG infusions every 3–4 weeks, a new FcRn inhibitor (Vyvgart Hytrulo) is now approved and allows at-home subcutaneous injection.

📊 CIDP affects ~40,000 people in the US. It is the most common chronic autoimmune neuropathy — yet 25–50% of patients are misdiagnosed as having Guillain-Barré syndrome or other conditions.

CIDP chronic inflammatory demyelinating polyneuropathy peripheral neuropathy autoimmune Vyvgart CIDP IVIG CIDP FcRn inhibitor

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👥 ~40,000 in US · Patients in US

🏥 Neurology · Specialty

💊 2 available · FDA-approved drugs

You're In Good Company

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CIDP is a condition that touches people at every level of public life. Their stories help normalize the conversation.

Christian Slater

CIDP

Actor Christian Slater has spoken publicly about his CIDP diagnosis — a rare autoimmune nerve disease — and becoming an advocate for greater awareness of the condition.

All information sourced from public statements and verified media reports. My Sugar Pill does not represent or speak for any individual.

FDA-Approved Treatments

Current approved therapies — what they are, who makes them, and what to ask your doctor.

Vyvgart Hytrulo

efgartigimod alfa & hyaluronidase-qvfc · argenx

FcRn Inhibitor (SQ)

First non-IVIG biologic approved for CIDP (June 2023). In ADHERE trial, 61% maintained improvement vs 20% placebo when switched from IVIG. Home injection enables independence from infusion centers.

💰 ~$460,000/year list Weekly subcutaneous self-injection (~90 sec) ✓ Patient Assist

IVIG (standard)

intravenous immunoglobulin · Multiple (Gamunex, Privigen, Octagam)

Immunoglobulin therapy

Standard first-line maintenance therapy for CIDP. Requires infusion center visits. Subcutaneous IVIG (SCIG) is an at-home alternative.

💰 ~$80,000–$150,000/year IV infusion every 3–4 weeks

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📋 Newly Diagnosed Guide

Diagnosed with CIDP? What you need to know right now.

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1. Seek a neuromuscular specialist for diagnosis confirmation

CIDP diagnosis is often uncertain. A neuromuscular neurologist at an academic center is the right resource to confirm the diagnosis, rule out POEMS syndrome, and establish whether you have typical or atypical CIDP.

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2. Ask about home treatment options

If IVIG infusion center visits are burdensome, ask about subcutaneous IVIG (at-home alternative) or Vyvgart Hytrulo (argenx) — a weekly self-injection approved for CIDP. Home treatment is life-changing for many patients.

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Frequently Asked Questions

Real questions from patients and caregivers — answered in plain English.