Formulation and evaluation of microcapsules of aspirin by coacervation phase separation method

Microencapsulation is a process in which tiny particles or droplets are surrounded by a coating to give small capsules, with useful properties. Microcapsule is a small sphere with uniform wall around it. The material inside the microcapsule is referred to as the core, internal phase or fill, whereas the wall sometimes called as shell, coating or membrane. Microencapsulation is a rapidly expanding technology in which very tiny droplets or particles of liquid or solid material are surrounded or coated with a continuous film of polymeric material. Aspirin (Acetylsalicylic acid) is a Non steroidal anti-inflammatory drug. It inhibits platelets aggregation and prolong bleeding time. This research article will emphasize formulation and evaluation of microcapsules of aspirin by coacervation phase separation method. coacervation phase separation techanique have been widely used to incorporate drugs into polymeric microcapsules.