Pfizer’s (PFE), OPKO’s BLA for Somatrogon Gets CRL From FDA Posted byZacks Equity Research January 24, 2022 Leave a comment on Pfizer’s (PFE), OPKO’s BLA for Somatrogon Gets CRL From FDA The FDA issues a Complete Response Letter to Pfizer (PFE) and OPKO Health’s biologics license application for somatrogon to treat growth hormone deficiency in pediatric patients.