Efficacy and Tolerability of Beclometasone/Formoterol Single Inhaler in Patients With Moderate to Severe Persistent Asthma

The purpose of this study is to evaluate the efficacy and tolerability of beclometasone/formoterol single inhaler in a twice daily regimen in patients with moderate to severe persistent asthma. Patients are randomised to receive either beclometasone/formoterol single inhaler (total daily dose: BDP/FF 400/24 mcg) or beclometasone CFC + formoterol DPI (total daily dose: BDP 1000 mcg + FF 24 mcg) or beclometasone CFC (total daily dose: BDP 1000 mcg) during 24 weeks of treatment.

Inclusion criteria

• Clinical diagnosis of moderate to severe persistent asthma (according to GINA 2002 guidelines)
• FEV1 > 40% and < 80% of predicted normal post-bronchodilator (and at least 0.7 L absolute value)
• Patients already treated for at least 2 months with an association of inhaled corticosteroids plus LABA at doses of:

750 - 1000 µg beclomethasone dipropionate or equivalent (ICSs) 24 µg formoterol or 100 µg salmeterol (LABAs)

• Or patients naïve of LABA already treated for at least 2 months with inhaled corticosteroids (doses as above) associated with a daily use of SABA and/or with clinical symptoms > 3 times in the week prior to inclusion
• A documented positive response to the reversibility test.

Exclusion criteria

• Pregnant or lactating females or women of childbearing potential without any efficient contraception.
• Heavy smokers defined as smoking for > 10 pack years.
• Evidence of asthma exacerbation causing an hospitalisation or requiring treatment with oral/parenteral corticosteroids or evidence of symptomatic airways infection in the 4 weeks prior to inclusion (3 months for slow-release corticosteroids).
• Seasonal asthma or asthma occurring only during episodic exposure to an allergen or occupational chemical sensitizer.
• Clinically significant or unstable concomitant diseases, including clinically significant laboratory abnormalities.
• Patients with an abnormal QTc interval value in the ECG test, defined as > 450 msec in males or > 470 msec in females.
• Evidence of asthma worsening during the week preceding randomisation (e.g. PEF variability > 30% during 2 consecutive days, SABA use > 8 puffs/day during 2 consecutive days, nocturnal awakenings due to asthma symptoms during 3 consecutive days