Panzyga in CIDP Administered at Different Infusion Rates

Inclusion Criteria: 1. Patients with diagnosis of definite or probable CIDP according to the EFNS/PNS Guideline 2010; including patients with Multifocal Acquired Demyelinating Sensory And Motor Neuropathy (MADSAM) or pure motor CIDP 2. Patients with active disease, i.e. not being in remission. 3. IVIG naïve patients with clinical indication for IVIG based on progressive or relapsing disease and adjusted INCAT (ONLS) disability score between 2 and 9 (with a score of 2 coming exclusively from leg disability). 4. Patients already receiving IVIG must be on 3- or 4-weekly IVIG treatment schedule with a calculated monthly dosage between 0.8 g/kg and 2.0 g/kg BW 5. ≥ 18 years of age 6. Voluntarily given, fully informed written consent obtained from patient before any study-related procedures are conducted 7. For enrolment into the Second Phase: At each of the last three infusions in the First Phase, administration of panzyga® had to be at the maximum infusion rate of 0.08 mL/kg/min and good tolerated- assessment by Investigator according to local site practice Exclusion Criteria: 1. MMN with conduction block 2. Patients who previously failed immunoglobulin therapy 3. Treatment with immunomodulatory/suppressive agents (cyclosporin, methotrexate, mitoxantrone, mycophenolate mofetil or azathioprine) during the six months prior to baseline visit 4. Patients on or treated with rituximab, alemtuzumab, cyclophosphamide, or other intensive chemotherapeutic regimens, previous lymphoid irradiation or stem cell transplantation during the 12 months prior to baseline visit 5. Respiratory impairment requiring mechanical ventilation 6. Myelopathy or evidence of central nervous system demyelination or significant persisting neurological deficits from stroke, or central nervous system (CNS) trauma 7. Clinical evidence of peripheral neuropathy from another cause such as 1. connective tissue disease or systemic lupus erythematosus (SLE) 2. HIV infection, hepatitis, Lyme disease 3. cancer (with the exception of basal cell skin cancer) 4. IgM paraproteinemia with anti-myelin associated glycoprotein antibodies 8. Diabetic neuropathy 9. Cardiac insufficiency (New York Heart Association \[NYHA\] III/IV), cardiomyopathy, significant cardiac dysrhythmia requiring treatment, unstable or advanced ischemic heart disease 10. Severe liver disease (ALAT 3x \> normal value) 11. Severe kidney disease (creatinine 1.5x \> normal value) 12. Hepatitis B, hepatitis C or HIV infection 13. Thromboembolic events: patients with a history of deep vein thrombosis (DVT) within the last year prior to baseline visit or pulmonary embolism ever; patients with susceptibility to embolism or DVT 14. Body mass index (BMI) ≥40 kg/m2 15. Selective IgA deficiency with known anti-IgA antibodies 16. History of hypersensitivity, anaphylaxis or severe systemic response to immuno-globulin, blood or plasma derived products, or any component of panzyga® 17. Known blood hyperviscosity, or other hypercoagulable states 18. Use of other blood or plasma-derived products within three months prior to enrolment 19. Patients with a past or present history of drug abuse or alcohol abuse within the preceding five years prior to baseline visit 20. Patients unable or unwilling to understand or comply with the study protocol 21. Participation in another interventional clinical study with IMP treatment currently or during the three months prior to enrolment 22. Women who are breast feeding, pregnant, or planning to become pregnant, or are unwilling to use an effective birth control method (such as implants, injectables, combined oral contraceptives, some intrauterine devices (IUDs), sexual abstinence or vasectomized partner) while on study.