Real-life acute lung function changes after lumacaftor/ivacaftor first administration in pediatric patients with
Aurélie Labaste1, Camille Ohlmann1, Catherine Mainguy1
1Centre de ressources et de compétences mucoviscidose, Hospices Civils de Lyon, Lyon, France.
Abstract:
The combination of lumacaftor and ivacaftor (LUM/IVA) has been reported to induce a mean acute absolute drop of -4.1% predicted forced expiratory volume in 1s (FEV1) after a unique administration in healthy subjects. The aim of the present study was to assess acute FEV1 changes after the first dose of LUM/IVA in CF patients. A total of 32 pediatric patients were included. Respiratory manifestations occurred in only 3 patients (9.4%), but FEV1 consistently decreased (-10.4±4.6%, range: -1.5; -21.8%). FEV1 only partially resumed after salbutamol inhalation. Patients with previously known significant reversible airway obstruction and low FEV1 were more at risk of FEV1 decrease.
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