10.22376/ijpbs.2019.10.1.p1-12 Volume 6 Issue 1 2015 (January - March) The effect of process parameters on the kinetics of microwave drying of lessThan i greaterThan Adathoda vasica lessThan /i greaterThan leaves was studied. The variation of moisture ratio with time was tested with thin-layer empirical drying models. As Midilli's expression gave better predictions for all data points than other models, it was expanded further. The microwave dried samples were subjected to microwave-assisted soxhlet extraction and microwave-assisted extraction. Moreover, the process variables considered in the present study had a significant effect on the extraction yield of alkaloids from lessThan i greaterThan A.vasica lessThan /i greaterThan leaves. Though a higher extract yield of 40.28 % was achieved for microwave-assisted soxhlet extraction under optimal conditions (microwave output power of 100 W, sample load of 10 g and solid to solvent ratio of 1:20 g/ml) in 10 hours, the microwave-assisted extraction consumed a maximum duration of 1178 sec for 100 W of microwave output power and yielded 37.83 % of extract. MAHESH GANESAPILLAI, ASHISH SINGH, BHAVANA SUBBA RAO , DEBIPARNA DE AND UPNYAAS JUNEJA Adathoda vasica, Drying, Empirical, Microwave-assisted, Alkaloids, Extraction yield 121-139