title: Revision of omalizumab dosing table for dosing every 4 instead of 2 weeks for specific ranges of bodyweight and baseline IgE.
abstract: The dosing level and frequency of omalizumab are guided by a dosing table based on total serum immunoglobulin E (IgE) and bodyweight. Using a validated, mathematical simulation model (based on concentration data from 8 studies), we evaluated the impact of a revised omalizumab dosing table (every 4 weeks dosing regimen) on the pharmacokinetic and pharmacodynamic profiles of free and total IgE. Safety analysis, in patients with high levels of exposure to omalizumab, was done using data from the clinical and post-marketing databases. The model accurately predicted observed omalizumab, free and total IgE concentrations. After reaching steady-state, the average increase in exposure was 10%, even for patients with the highest concentrations at the upper 97.5th percentile. Free IgE suppression slightly increased in the initial phase, and slightly reduced at the trough of the dosing cycle, but average suppression remained similar for both regimens. The safety profile of omalizumab was similar for patients receiving higher or lower doses. Thus, doubling the dose of omalizumab, in a subset of patients receiving 225-300 mg of omalizumab (every 2 weeks dosing regimen) can efficiently suppress free IgE without compromising safety or efficacy.
authors.affiliation: Novartis Pharma AG, Basel, Switzerland. Electronic address: phil.lowe@novartis.com.
authors.forename: Philip J
authors.initials: PJ
authors.lastname: Lowe
authors.affiliation: Novartis Pharmaceuticals UK Limited, Horsham, West Sussex, UK.
authors.forename: Panayiotis
authors.initials: P
authors.lastname: Georgiou
authors.affiliation: Novartis Pharmaceuticals UK Limited, Horsham, West Sussex, UK.
authors.forename: Janice
authors.initials: J
authors.lastname: Canvin
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D018927:Anti-Asthmatic Agents / Q000008:administration & dosage* / Q000097:blood / Q000493:pharmacokinetics / Q000494:pharmacology; D000888:Antibodies, Anti-Idiotypic / Q000008:administration & dosage* / Q000097:blood / Q000494:pharmacology; D061067:Antibodies, Monoclonal, Humanized / Q000008:administration & dosage* / Q000097:blood / Q000493:pharmacokinetics / Q000494:pharmacology; D001249:Asthma / Q000097:blood / Q000188:drug therapy; D001835:Body Weight; D002648:Child; D004311:Double-Blind Method; D004334:Drug Administration Schedule; D006801:Humans; D007073:Immunoglobulin E / Q000097:blood; D008875:Middle Aged; D008954:Models, Biological; D000069444:Omalizumab; D055815:Young Adult
chemical_list: D018927:Anti-Asthmatic Agents; D000888:Antibodies, Anti-Idiotypic; D061067:Antibodies, Monoclonal, Humanized; D000069444:Omalizumab; D007073:Immunoglobulin E
keywords: Allergic asthma; Anti-immunoglobulin E; Dosing table; Modeling and simulation; Omalizumab