Influence of the efavirenz micronization on tableting and dissolution.

Pharmaceutics (2012-01-01)
Eduardo Costa Pinto, Flávia Almada do Carmo, Thiago da Silva Honório, Rita de Cássia da Silva Ascenção Barros, Helena Carla Rangel Castro, Carlos Rangel Rodrigues, Valéria Sant'anna Dantas Esteves, Helvécio Vinícius Antunes Rocha, Valeria Pereira de Sousa, Lucio Mendes Cabral

The purpose of this study was to propose an analytical procedure that provides the effects of particle size and surface area on dissolution of efavirenz. Five different batches obtained by different micronization processes and with different particle size distribution and surface area were studied. The preformulation studies and dissolution curves were used to confirm the particle size distribution effect on drug solubility. No polymorphic variety or amorphization was observed in the tested batches and the particle size distribution was determined as directly responsible for the improvement of drug dissolution. The influence of the preparation process on the tablets derived from efavirenz was observed in the final dissolution result in which agglomeration, usually seen in non-lipophilic micronized material, was avoided through the use of an appropriate wet granulation method. For these reasons, micronization may represent one viable alternative for the formulation of brick dust drugs.

Product Number
Product Description

Lactose Monohydrate, analytical standard