ADVAIR DISKUS ADVAIR - GlaxoSmithKline

There was no evidence that the systemic exposure to salmeterol was altered by
concomitant exposure to fluticasone propionate. In one study, the salmeterol plasma C max
and T max were not significantly different when compared between the groups receiving
salmeterol xinafoate 100 mcg and fluticasone propionate 500 mcg twice daily in the
combination product (C max 0.23 ng/mL) or salmeterol xinafoate 100 mcg twice daily as a
single agent (C max 0.22 ng/mL).
When fluticasone propionate alone or the salmeterol xinafoate/ fluticasone propionate
product are administered at the same dosage, there is similar systemic exposure to
fluticasone propionate.
Long-Term Outcomes in the Management of COPD
SCO30003 was a 3 year study to assess the effect of treatment with ADVAIR ® DISKUS ®
50/500 mcg twice daily, fluticasone propionate 500 mcg twice daily, salmeterol 50 mcg
twice daily or placebo on all-cause mortality in 6,112 patients with COPD; defined as the
Intent-to-Treat-Efficacy (ITT) population. The patients were 40 to 80 years of age with
moderate to severe COPD, with a baseline (pre-bronchodilator) FEV 1 < 60% of predicted
at study entry, and < 10% of predicted reversibility and were randomised to double-blind
medication. During the study, patients were permitted usual COPD therapy with the
exception of other inhaled corticosteroids, long-acting bronchodilators and long-term
systemic corticosteroids. Survival status at 3 years was determined for all patients
regardless of withdrawal from study medication.
The primary endpoint of study SCO30003 was the effect of ADVAIR ® DISKUS ®
50/500 mcg twice daily versus placebo on all-cause mortality at 3 years. After three
years, 15.2% and 12.6% of patients died in the placebo and ADVAIR ® DISKUS ® 50/500
mcg treatment groups respectively, equating to an absolute risk reduction of 2.6%. Based
on the results of this study, the hazard ratio for ADVAIR ® DISKUS ® 50/500 mcg versus
placebo was 0.825 (95% CI 0.68, 1.00, p = 0.052), all adjusted for two pre-specified
interim analyses. There was a trend towards improved survival in patients treated with
ADVAIR ® DISKUS ® 50/500 mcg compared with placebo over 3 years however this did
not achieve the pre-specified statistical significance level of p ≤ 0.05.
In study SCO30003, ADVAIR ® DISKUS ® 50/500 mcg reduced the rate of moderate to
severe exacerbations by 25% compared with placebo (95% CI: 19% to 31%; p < 0.001).
ADVAIR ® reduced the exacerbation rate by 9% compared with fluticasone propionate
(95% CI: 1% to 16%; p = 0.024) and 12% compared with salmeterol (95% CI: 5% to
19%; p = 0.002).
Health Related Quality of Life, as measured by the St. George’s Respiratory
Questionnaire (SGRQ) was also improved by all active treatments in comparison with
placebo in study SCO30003. An adjusted mean change of -4.3 unit decrease was seen at
week 48 with ADVAIR ® DISKUS ® 50/500 mcg. The average improvement over three
years for ADVAIR ® DISKUS ® compared with placebo was -3.1 units (95% CI: -4.1 to
-2.1; p < 0.001), compared with salmeterol was -2.2 units (p < 0.001) and compared with
fluticasone propionate was -1.2 units (p = 0.017).
July 29, 2014
Page 47 of 67