TY  - JOUR 
T1  - Extended release promethazine HCl using acrylic polymers by freeze-drying and spray-drying techniques: formulation considerations
JO  - Brazilian Journal of Pharmaceutical Sciences
A1  - Tiwari, Ruchi
A1  - Srivastava, Birendra
A1  - Tiwari, Gaurav
A1  - Rai, Awanik
SN  - 1984-8250
UL  - 10.1590/S1984-82502009000400029
VL  - 45 
Y1  - 2009
PB  - Brasil 
ER  -