Adults and Pediatric Patients 12 Years of Age and Older

The efficacy of ALVESCO was evaluated in six randomized, double-blind, placebo-controlled, parallel-group clinical trials in adult and pediatric patients 12 years of age and older with mild persistent to severe persistent asthma. The six trials included two trials in which patients were treated with ALVESCO administered once daily for 12 weeks, two trials in which patients were treated with ALVESCO twice daily for 12 weeks, and two trials in which patients were treated with ALVESCO using once daily and twice daily dosing regimens for 12 or 16 weeks. These trials included a total of 2843 patients (1167 males and 1676 females) of whom 296 were pediatric patients 12 to 17 years of age. The primary efficacy endpoint in four of the six trials was the mean change from baseline in pre-dose FEV1 at endpoint (last observation). FEV1 was measured prior to the morning dose of study medication (at the end of the 24-hour dosing interval for once daily administration, and at the end of the 12-hour dosing interval for twice daily administration). In one of the six trials, the primary endpoint was the change from baseline in the average of the pre-dose FEV1 at Weeks 12 and 16, and in another trial, reduction of oral corticosteroid use was the primary efficacy endpoint. Additional efficacy variables were asthma symptoms, use of albuterol for rescue, AM PEF, nighttime awakenings, and withdrawal due to asthma worsening. 

The two once daily dosing trials were identically designed and were conducted to evaluate the efficacy of ALVESCO 80, 160, and 320 mcg given once daily in the morning for 12 weeks in patients with mild to moderate asthma maintained on inhaled bronchodilators and/or corticosteroids. The results of these trials, along with other trials that explored twice daily dosing, indicate that once daily dosing is not the optimum dosing regimen for ALVESCO. 

Four trials were designed to evaluate the efficacy of ALVESCO administered twice daily in patients with asthma who were previously maintained on bronchodilators alone, patients who were previously maintained on inhaled corticosteroids, and patients who were previously maintained on oral corticosteroids.

Patients Previously Maintained on Bronchodilators Alone

The efficacy of ALVESCO was studied in a randomized, double-blind, placebo-controlled trial in 691 patients with mild-to-moderate persistent asthma (mean baseline percent predicted FEV1 of 72%) previously using reliever therapy (bronchodilator therapy alone). In this trial, patients were treated with ALVESCO 160 mcg once daily in the morning for 16 weeks, ALVESCO 80 mcg twice daily for 16 weeks, or ALVESCO 80 mcg twice daily for 4 weeks followed by ALVESCO 160 mcg once daily in the morning for 12 weeks or placebo for 16 weeks. Compared to placebo, all ALVESCO doses showed statistically significant improvement at Week 16 in AM pre-dose FEV1. However, the increase in AM pre-dose FEV1 in the patients treated with ALVESCO 80 mcg twice daily was significantly greater than that observed in patients treated with ALVESCO 160 mcg administered once daily. Compared to placebo, increases in AM pre-dose FEV1 were 0.12 L or 5.0% for ALVESCO 160 mcg once daily, 0.24 L or 10.4% for ALVESCO 80 mcg twice daily, 0.13 L or 5.0% for ALVESCO 80 mcg twice daily for 4 weeks followed by ALVESCO 160 mcg once daily. Other measures of asthma control, AM PEF, and need for rescue albuterol also improved in all the ALVESCO treatment groups compared to placebo but the improvement was greatest with the ALVESCO 80 mcg twice daily treatment arm. Discontinuations from the study for lack of efficacy were lower in the ALVESCO treatment groups compared to placebo. Fewer patients receiving ALVESCO experienced asthma worsening than did patients receiving placebo. The AM pre-dose FEV1 results are shown in Figure 1 below.

Figure 1: A 16-Week Double-Blind Clinical Trial Evaluating ALVESCO Administered Once Daily, Twice Daily, or Twice Daily Initially for 4 Weeks Followed by Once Daily for 12 Weeks, in Adult and Pediatric Patients (12 Year and Older) with Mild-to-Moderate Asthma Previously Maintained on Bronchodilators Alone

Patients Previously Maintained on Inhaled Corticosteroids

The efficacy of ALVESCO in asthma patients previously maintained on inhaled corticosteroids was evaluated in two randomized, double-blind, placebo-controlled trials of 12-weeks treatment duration. In one trial, asthmatic patients with mild to moderate persistent asthma (mean baseline percent predicted FEV1 of 79%), previously maintained on controller therapy (predominantly inhaled corticosteroids) were treated with ALVESCO 160 mcg once daily in the morning, ALVESCO 80 mcg twice daily or placebo.

The AM pre-dose FEV1 results are shown in Figure 2 below.

Figure 2: A 12-Week Double-Blind Clinical Trial Evaluating ALVESCO Administered Once and Twice Daily in Adult and Pediatric Patients (12 Years and Older) with Mild-to-Moderate Asthma Previously Maintained on Inhaled Corticosteroids

Statistically significantly more increases in AM pre-dose FEV1 compared to placebo were seen at 12 weeks for ALVESCO 160 mcg once daily (0.14 L or 5.7%) and ALVESCO 80 mcg twice daily (0.19 L or 7.5%). Asthma symptoms scores, AM PEF, and decreased need for rescue albuterol remained relatively stable in the ALVESCO treatment groups compared to slight worsening in the placebo. Compared to placebo, fewer patients receiving ALVESCO experienced worsening of asthma. 

In the other trial, 257 patients with moderate to severe persistent asthma (mean baseline percent predicted FEV1 of 54%) were treated with ALVESCO 160 or 320 mcg twice daily for 12 weeks. The AM pre-dose FEV1 results are shown in Figure 3 below.

Figure 3: A 12-Week Double-Blind Clinical Trial Evaluating ALVESCO Administered Twice Daily in Adult and Pediatric Patients (12 Years and Older) with Severe Asthma

Compared to placebo, both ALVESCO doses showed statistically significantly more improvement in pre-dose FEV1 (0.11 L or 8.6% and 0.18 L or 11.8%). Other measures of asthma control, AM PEF, symptoms, and need for rescue albuterol also showed improvement compared to placebo. Compared to placebo, fewer patients treated with ALVESCO experienced worsening of asthma. 

Patients treated with ALVESCO were also less likely to discontinue study participation due to asthma deterioration. 

Patients Previously Maintained on Oral Corticosteroids

In a 12-week double-blind clinical trial, 140 patients with severe persistent asthma (mean FEV1 at baseline 53% predicted) who had failed prior efforts to eliminate oral prednisone use and had established their lowest effective prednisone dose were randomized to ALVESCO given by oral inhalation at doses of 320 or 640 mcg twice daily or placebo. The average prednisone dose at baseline was approximately 12 mg/day. Compared to patients on placebo whose prednisone requirements increased by 4%, those treated with ALVESCO 320 mcg and 640 mcg twice daily significantly reduced their prednisone requirements by 47% and 62%, respectively. At the same time, patients on ALVESCO maintained asthma control as reflected by lung function, symptoms, and need for rescue albuterol. A significantly larger percentage of patients on ALVESCO were able to reduce oral prednisone use by 50% or more as compared to placebo (64% and 77% of the patients treated with 320 mcg and 640 mcg, respectively twice daily as compared with 33% of patients on placebo). There was no statistically significant difference observed with ALVESCO 640 mcg twice daily compared to ALVESCO 320 mcg twice daily.