As Principal Investigator

1. Multicentric clinical trials of Indigenous drugs in bronchial asthma (Indian Council of Medical Research).
2. Study of effects of a stressful occupation on respiratory health (Department of Science & Technology, Government of India).
3. Clinical and Physiological implications of failure of calcium homeostatic pumps in asthma and their modulation by inhaled corticosteroids (Council of Scientific and Industrial Research)
4. A study of prevalence of bronchial asthma in school children in Delhi (Indian Council of Medical Research)
5. An epidemiological investigation into respiratory morbidity due to air pollution in Delhi (World Health Organisation)
6. Bronchodilatation in normal elderly subjects following ipra­tropium bromide and salbutamol aerosols and their effect on other lung functions (Indian Council of Medical Research)
7. Efficacy and tolerance of R-salbutamol in bronchial asthma. (Cipla India Ltd).
8. Comparison of addition of salmeterol to fluticasone and doubling of fluticasone in bronchial asthma (Cipla Ltd)
9. Study of Renin-Angiotensin-Aldosterone system in COPD (Cipla Ltd)
10. Comparison of the efficacy of Ciclesonide MDI with budesonide MDI in stable asthmatic patients pretreated with inhaled corticosteroids (Zydus Byk India Ltd)
11. Oxidant-antioxidant balance in bronchial asthma: Evaluation of the role of alpha-tocopherol in treatment (Indian Council of Medical Research)
12. Effect of High Dietary Sodium Intake and Inhibition of Sodium-Potassium Adenosine Triphosphatase on Induction of Asthma in Guinea Pigs (Department of Science & Technology)
13. Potentiation of allergic asthma by air pollution: The Ozone-Allergen interaction and its modulation by dietary antioxidants, alpha-tocopherol and ascorbic acid. (Indian Council of Medical Research)
14. Air Pollution and mortality in Delhi, India. In collaboration with the Energy Research Institute (TERI) and AIIMS, NDMC. (Health Effects Institute, USA)
15. Assessment of the Effects of High Particulate Pollutants on Pulmonary Health Status in Selected Mega-cities of South Asia. (National Physical Laboratory)
16. Pulmonary Function in Normal Children in India: Development of reference standards for spirometry for different regions using a uniform methodology. (Indian Council of Medical Research)
17. Pulmonary Function in Normal Adults in India: Development of Reference Standards for Spirometry, Static Lung Volumes and Single Breath Diffusion Capacity. (Indian Council of Medical Research)
18. Heart Rate Variability in Chronic Obstructive Pulmonary Disease: Association with Systemic Inflammation and Clinical Implications. (Department of Science & Technology)

As Co-Investigator

1. Transmembrane signalling in bronchial asthma. (Department of Science & Technology; Principal investigator Prof SK Bansal, Department of Bochemistry
2. Multicentric studies on the prevalence of bronchial asthma. (Indian Council of Medical Research, Principal investigator Prof SK Jindal, Department of Pulmonary Medicine, PGIMER, Chandigarh)
3. Prevalence of Mycoplasma pneumoniae infection in patients of acute exacerbations of Chronic Obstructive Pulmonary Disease. (Indian Council of Medical Research Principal investigator DrMandira Varma, Department of Microbiology)
4. Study of Virological and biochemical regulatory mechanism of influenza virus induced apoptosis in murine model of allergic asthma. (Council of Scientific & Industrial Research. Principal investigator DrMadhu Khanna, Department of Virology)
5. Genetic Analysis of Influenza Virus in Clinical Specimens by Rapid Molecular Techniques. (Department of Science & Technology; Principal investigator DrMadhu Khanna, Department of Virology)