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CLINICAL TRIAL
COMPARATIVE STUDY
JOURNAL ARTICLE
MULTICENTER STUDY
RANDOMIZED CONTROLLED TRIAL
RESEARCH SUPPORT, NON-U.S. GOV'T
Clinical efficacy and safety of fluticasone propionate 1 mg per day administered via a HFA 134a pressurized metered dose inhaler to patients with moderate to severe asthma. International study group.
Respiratory Medicine 2000 June
This multi-national, double-blind, randomized, parallel-group study compared the efficacy and tolerability of fluticasone propionate 500 microg twice daily propelled either by the non-chlorofluorocarbon (CFC) propellant, hydrofluoroalkane (HFA) 134a, or the CFC propellants 11 and 12 used in the established pressurized metered dose inhaler (pMDI). The study period was 12 months and involved 412 subjects with moderate to severe asthma (HFA 134a pMDI: n = 203; CFC pMDI: n = 209). For the first 3 months, subjects kept a daily record card and attended the clinic every 4 weeks. Thereafter, they kept daily diaries for 2 weeks before each clinic assessment, which were performed at the end of 6, 9 and 12 months. Mean morning peak expiratory flow (PEF) increased during the first week in both treatment groups. By the end of week 12 the adjusted mean increase from baseline in morning PEF was 21 and 23 l min(-1) in the HFA 134a and CFC pMDI groups, respectively, and this increase was maintained throughout the 12-month study period. Similar improvements were detected in other diary card parameters and in clinic lung function measurements. The two groups were shown to be clinically equivalent in terms of all efficacy variables and there were no differences in tolerability. There were few reports of low serum cortisol levels during the 12-month study period, and serum cortisol levels were similar at baseline and after 12 weeks and 12 months of treatment in the two groups. In conclusion, the new HFA 134a fluticasone propionate pMDI is as effective and safe as the established CFC fluticasone propionate pMDI when used at a dosage of 1 mg day(-1).
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