Tolerability of high cumulative doses of the HFA modulite beclomethasone dipropionate/formoterol combination inhaler in asthmatic patients.

Tolerability of high cumulative doses of the HFA modulite beclomethasone dipropionate/formoterol combination inhaler in asthmatic patients. Research Abstract Details 

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Tolerability of high cumulative doses of the HFA modulite beclomethasone dipropionate/formoterol combination inhaler in asthmatic patients. Abstract Text:

The corticosteroid beclomethasone dipropionate (BDP) has been formulated with the long acting beta agonist formoterol (BDP/formoterol 100mug/6mug, Fostertrade mark) in a single inhaler using Modulite((R)) technology. We have investigated the acute tolerability of high, cumulative doses of BDP/formoterol compared to formoterol alone and placebo. This was a double blind, 3-way cross-over comparison of 10 puffs of BDP/formoterol 100mug/6mug or formoterol 6mug or placebo during maintenance treatment with BDP/formoterol two puffs per day. Pharmacokinetics over 12h during maintenance treatment was measured on day 7. High cumulative doses were then administered on three separated days. Eighteen patients with asthma were recruited (mean FEV(1) 65% predicted). The primary endpoint was serum potassium over the 12h period after high doses. QTc, blood pressure and heart rate over 12h, and plasma lactate and glucose over 3h following dosing were assessed. Formoterol caused a significantly greater decrease in serum potassium than BDP/formoterol or placebo (difference in mean minimum concentrations; 0.11 and -0.15mmol/l, respectively, p<0.05 for both comparisons). No significant differences in serum potassium parameters were found between BDP/formoterol and placebo. QTc, plasma lactate and vital signs values observed with the combination were not statistically different from those with formoterol alone. For glucose, the mean maximum increase after formoterol treatment was 0.4mmol/l (p<0.01 compared to placebo), while BDP/formoterol treatment caused a maximum increase of 0.7mmol/l (p<0.01 compared to formoterol and placebo). The active metabolite of BDP is beclomethasone-17-monopropriate (B17MP), which reached C(max) at 0.25h, with an elimination half-life of 3.7h. Formoterol also reached C(max) at 0.25h, and concentrations were measurable up to 12h. High doses of BDP/formoterol did not significantly reduce serum potassium, while formoterol alone did to a greater extent. The BDP/formoterol combination was well tolerated, and exhibited a safety profile generally similar to formoterol alone when administered in high doses to stable asthmatic patients.

Tolerability of high cumulative doses of the HFA modulite beclomethasone dipropionate/formoterol combination inhaler in asthmatic patients. Publishing Authors By Initials

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Tolerability of high cumulative doses of the HFA modulite beclomethasone dipropionate/formoterol combination inhaler in asthmatic patients. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Pulmonary pharmacology & therapeutics

VOLUME: 21

Page Numbers: 551-7

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ISSN: 1094-5539

DAY: 19

MONTH: 01

YEAR: 2008

Tolerability of high cumulative doses of the HFA modulite beclomethasone dipropionate/formoterol combination inhaler in asthmatic patients. Information

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LANGUAGE: eng

NlmUniqueID: 9715279

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AFFILIATION: Medicines Evaluation Unit, South Manchester University Hospitals Trust, University of Manchester, Southmoor Road, Wythenshawe, Manchester M23 9QZ, UK.

Country: England

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MEDLINETA: Pulm Pharmacol Ther

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