A Multicenter, Postmarketing Study Evaluating the Concentration of Cimzia® in Mature Breast Milk of Lactating Mothers

Pharmacokinetic (PK) samples will be taken from breast milk of lactating mothers on an established dosing regimen of CZP on Day 0 of the Sampling Period, just prior to next scheduled dose of CZP, and on Days 2, 4, 6, 8, 10, 12, and 14 (pre-dose for mothers on CZP Q2W), relative to CZP administration on Day 0. In addition, in mothers on a CZP Q4W dosing regimen, the concentration of CZP in breast milk will also be evaluated on or about Day 28 (i.e., prior to and on the same day of the next scheduled administration of CZP).

Mothers who decided to continue on, or to start treatment with, Certolizumab Pegol (CZP) for an approved indication with their treating physician prior to participation into this study. The mother is responsible for procuring her own supply of commercial CZP. The CZP dose and administration schedule will be as per the locally approved label.