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Development of room temperature stable formulation of formoterol fumarate/beclomethasone HFA pMDI Purohit D, Trehan A, Arora V - Indian J Pharm Sci
Indian Journal of Pharmaceutical Sciences
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ABSTRACT
Year : 2009  |  Volume : 71  |  Issue : 6  |  Page : 713-715
Development of room temperature stable formulation of formoterol fumarate/beclomethasone HFA pMDI


Research & Development Centre (R&D I), Ranbaxy Laboratories Limited, Plot No. 20, Sector 18, Udyog Vihar Industrial Area, Gurgaon-122 015, India

Date of Web Publication 3-Feb-2010

Correspondence Address:
D Purohit
Research & Development Centre (R&D I), Ranbaxy Laboratories Limited, Plot No. 20, Sector 18, Udyog Vihar Industrial Area, Gurgaon-122 015
India
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   Abstract  

The primary aim of present investigation was to develop and formulate room temperature stable formulation of formoterol fumarate and beclomethasone dipropionate with extra fine part size of hydrofluoroalkane pressurized metered dose inhalers. Particle size distribution of hydrofluoroalkane pressurized metered dose inhalers was evaluated using Twin Stage Glass Impinger and Anderson Cascade Impactor. A tetrafluoroethane and/or heptafluoropropane were evaluated for preparation of hydrofluoroalkane pressurized metered dose inhalers. The fine particle fractions delivered from hydrofluoroalkane propellant suspension pressurized metered dose inhalers can be predicted on the basis of formulation parameters and is dependent of metering chamber of valve and orifice size of actuators. The results presented in investigation showed the importance of formulation excipients with formulation of pressurized metered dose inhalers viz, canister, valve and actuators used in formulations.


Keywords: Impinger, aerosols, deposition of emitted dose, delivered dose uniformity


How to cite this article:
Purohit D, Trehan A, Arora V. Development of room temperature stable formulation of formoterol fumarate/beclomethasone HFA pMDI. Indian J Pharm Sci 2009;71:713-5

How to cite this URL:
Purohit D, Trehan A, Arora V. Development of room temperature stable formulation of formoterol fumarate/beclomethasone HFA pMDI. Indian J Pharm Sci [serial online] 2009 [cited 2014 Mar 11];71:713-5. Available from: http://www.ijpsonline.com/text.asp?2009/71/6/713/59563


To develop room temperature stable formulation of formoterol fumarate/beclomethasone dipropionate hydrofluoroalkane (HFA) pressurized metered dose inhalers (pMDI) for lung delivery. The HFA pMDI were prepared from ozone friendly propellants viz, tetrafluoroethane and/or heptafluoropropane. A HFA based formulation of formoterol fumarate/beclomethasone dipropionate was developed to deliver 6 +100/200 µg per actuation over 120 doses. The present formulation comprises polyvinylpyrrolidone and/or polyethylene glycol in an amount sufficient to enhance the physical stability of suspension and provide extra fine particle size of formoterol fumarate/beclomethasone dipropionate. Formoterol fumarate and beclomethasone dipropionate have different modes of action. Beclomethasone dipropionate, a synthetic glucocorticoid given by inhalation at recommended doses has an antiinflammatory action, which plays an important role in the efficacy of beclomethasone dipropionate in controlling symptoms and improving lung function in asthma. Inhaled beclomethasone dipropionate probably acts topically at the site of deposition in the bronchial tree after inhalation. Formoterol is a selective â2 adrenergic agonist that produces relaxation of bronchial smooth muscle in patients with reversible airways obstruction. In addition to its bronchodilator action, formoterol also inhibits mast cell mediator release, plasma exudation and may reduce sensory nerve activation. Thus these two classes of drug address complementary aspects of the pathophysiology of asthma and COPD that neither drug class is able to achieve alone.


   Materials and Methods   Top


Excipients selected for evaluation were polyethylene glycol (at levels of 0.05 to 2.5% w/w, supplied by Clariant, India) and polyvinylpyrrolidone (at levels of 0.002 to 0.5% w/ w, supplied by Signet, India). The amount of micronised formoterol fumarate and beclomethasone dipropionate were mixed in a pressure vessel in a way to get the appropriate dose of formoterol fumarate and beclomethasone dipropionate to be able to deliver the desired doses to the patient. Beclometasone dipropionate/formoterol fumarate in above formulation is characterized by an extra-fine particle size distribution which results in a more potent effect than individual formulation of beclomethasone available in market. The above combination is indicated for regular treatment of asthma where use of a combination product (inhaled corticosteroid and long-acting beta 2 -agonist) is appropriate.

pMDIs were prepared by single step manufacturing process as given here: Introduction of active/excipients into pressure vessel, Addition of required quantity of propellant to provide sufficient number of doses, Filling of drug/propellant mixture into pre-crimped aluminum canister (supplied by Presspart, UK).


   Results and Discussion   Top


Delivered dose uniformity results obtained with a DF316/50 valve fitted with a 0.3 mm outlet orifice diameter actuator are shown in [Figure 1] and those obtained with a DF316/50 valve fitted with a 0.48 mm outlet orifice diameter actuator are shown in [Figure 2]. Deposition of emitted dose by TSLI results are summarized in [Table 1]. During this study, Polyethylene glycol at levels less than 0.5% w/w was found to ensure good product performances and valve functioning throughout the MDI units' life. The level of polyvinylpyrrilodone selected also helped to decrease the settling of particles and prevents agglomeration of actives. This formulation was readily re-dispersible and avoiding invariability dosing of the drug. The stable suspension of particulate beclomethasone/ formoterol fumarate was selected by using HFA propellants closely matching the density of the micronised actives.

In conclusion, the novel combination of formoterol fumarate and beclomethasone dipropionate is a suspension based HFA pMDI product. The combined characteristics of room temperature stable formulation with good deposition of both drugs in lung provides unique characteristics to the above fixed dose combination, highly attractive in terms of patient usage requirements and commercial supply.


   Acknowledgements   Top


The authors would like to thank Valois, France& Presspart, UK for supplying canisters and valves for development trials.[4]

 
   References   Top

1. Purewal T. Formulation of metered dose inhalers, Metered dose inhalers technology, Buffalo Grove: Interpharm Press; 1998, p. 1-8.  Back to cited text no. 1      
2. Vervaet C, Byron PR. Drug-surfactant-propellant interactions in HFA-formulations. Int J Pharm 1999;186:13-30.  Back to cited text no. 2  [PUBMED]  [FULLTEXT]  
3. Hickey AJ. Inhalation Aerosols, Physical and Biological Basis for Therapy, 2nd ed. In; Lenfant C. Editors. Lung Biology in Health and Disease. Vol. 221. Boca Raton: In-forma Health Care; 2007.  Back to cited text no. 3      
4. Murnane D, Martin GP, Marriott C. Investigations into the Formulation of Metered Dose Inhalers of Salmeterol Xinafoate and Fluticasone Propionate Microcrystals. Pharm Res 2008;25:2283-91.  Back to cited text no. 4  [PUBMED]  [FULLTEXT]  


    Figures

  [Figure 1], [Figure 2]
 
 
    Tables

  [Table 1]

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