A QbD based study in development, optimization and forced degradation behaviour of Epinastine Hydrochloride in Metered dose inhaler by RP-HPLC. - JENA, BIKASH RANJAN; PANDA, SIVA PRASAD; KULANDAIVELU, UMASANKAR; ALAVALA, RAJASEKHAR REDDY; RAO, G. S. N. KOTESWARA; SWAIN, SURYAKANTA; GHOSE, DEBASHISH; PRADHAN, DEBI PRASAD (International Journal of Pharmaceutical Research (09752366), 2021)