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Impact of smoking status and concomitant medications on the effect of high-dose N-acetylcysteine on chronic obstructive pulmonary disease exacerbations: A post-hoc analysis of the PANTHEON study

Artikel i vetenskaplig tidskrift
Författare A. Papi
J. P. Zheng
G. J. Criner
Leonardo M. Fabbri
P. M. A. Calverley
Publicerad i Respiratory Medicine
Volym 147
Sidor 37-43
ISSN 0954-6111
Publiceringsår 2019
Publicerad vid Institutionen för medicin
Sidor 37-43
Språk en
Länkar https://doi.org/10.1016/j.rmed.2018...
Ämnesord Mucolytic, Chronic obstructive pulmonary disease, Exacerbations, double-blind, triple therapy, copd exacerbations, chronic-bronchitis, parallel-group, placebo, prevention, salmeterol, tiotropium, trial, Cardiovascular System & Cardiology, Respiratory System
Ämneskategorier Kardiovaskulär medicin

Sammanfattning

Background: N-acetylcysteine (NAC) 600 mg twice daily is a well-tolerated oral antioxidant mucolytic that reduces the risk of moderate to severe chronic obstructive pulmonary disease (COPD) exacerbations. PANTHEON was one of the largest studies to evaluate NAC in COPD. It recruited current, ex-and never-smokers, concomitantly treated with other medications, and used a symptom-based definition of COPD exacerbations rather than the conventional healthcare resource utilisation (HCU) criteria. Methods: This manuscript reports post-hoc analyses of the PANTHEON dataset investigating whether smoking status or use of concomitant medications influenced the efficacy of NAC in terms of reducing exacerbations, defined according to HCU. Results: Compared with placebo (N=482), NAC (N=482) reduced the rate of HCU events by 20% (p=0.0027), with a larger effect in current/ex-smokers (23%; p < 0.01). In patients receiving NAC and longacting inhaled bronchodilator(s) but no ICS, there was a 60% reduction in the rate of exacerbations compared to those receiving placebo, long-acting bronchodilator(s) and ICS (p < 0.0001). Conclusions: Overall, these post-hoc hypothesis-generating analyses confirm that NAC reduces the rate of COPD exacerbations, particularly in patients with COPD who have a significant smoking history, and in those not treated with ICS. NAC may provide an alternative to ICS-containing combinations in these patient subgroups.

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