title: Preparation of benznidazole pellets for immediate drug delivery using the extrusion spheronization technique.
abstract: Recent advances in the treatment of Chagas disease have followed combinations of drugs that act synergistically against infection, predominantly including benznidazole (BNZ) and azoles derivatives. Possible incompatibilities between these drugs, slow dissolution of BNZ and dose adjustment difficulties are technological obstacles to the development of multidrug formulations. Thus, in the present study, BNZ pellets were developed using extrusion spheronization for immediate drug delivery. Preformulation studies were then performed using thermal analysis and infrared spectroscopy and compatibility between the drug and selected excipients (polyethylene glycol 6000, sodium starch glycolate, microcrystalline cellulose and sodium croscarmellose) was investigated. No chemical decomposition of BNZ was observed, even in samples submitted to wet granulation and thermal stress. Subsequently, formulations were elaborated according to a simplex lattice experimental design using polyethylene glycol, sodium starch glycolate and sodium croscarmellose as disintegrating agents. In these experiments, BNZ pellets showed appropriate physicochemical characteristics, including high drug load capacity and excellent flow properties. The mixture experimental design allowed identification of adequate compositions of disintegrating agents and achieved rapid disintegration and dissolution of pellets. Optimum performance was achieved using polyethylene glycol and sodium croscarmellose at 5.0% w/w each. The present BNZ pellets are versatile alternatives to treat Chagas disease and provide insights into the preparation of multidrug systems.
authors.affiliation: a Laboratory of Food, Drugs and Cosmetics (LTMAC) , University of Brasília (UnB) , Brasília , Brazil.|b Brazilian Health Surveillance Agency (ANVISA) , Brasília , Brazil.
authors.forename: Ihatanderson
authors.initials: I
authors.lastname: Alves-Silva
authors.affiliation: c Laboratory of Pharmaceutical Technology , Federal University of Goiás (UFG) , Goiânia , Brazil.
authors.forename: Ricardo N
authors.initials: RN
authors.lastname: Marreto
authors.affiliation: a Laboratory of Food, Drugs and Cosmetics (LTMAC) , University of Brasília (UnB) , Brasília , Brazil.
authors.forename: Guilherme M
authors.initials: GM
authors.lastname: Gelfuso
authors.affiliation: a Laboratory of Food, Drugs and Cosmetics (LTMAC) , University of Brasília (UnB) , Brasília , Brazil.
authors.forename: Lívia C L
authors.initials: LC
authors.lastname: Sá-Barreto
authors.affiliation: c Laboratory of Pharmaceutical Technology , Federal University of Goiás (UFG) , Goiânia , Brazil.
authors.forename: Eliana M
authors.initials: EM
authors.lastname: Lima
authors.affiliation: a Laboratory of Food, Drugs and Cosmetics (LTMAC) , University of Brasília (UnB) , Brasília , Brazil.
authors.forename: Marcílio S S
authors.initials: MS
authors.lastname: Cunha-Filho
mesh_terms: D002266:Carboxymethylcellulose Sodium / Q000737:chemistry; D002482:Cellulose / Q000737:chemistry; D002626:Chemistry, Pharmaceutical / Q000379:methods; D004339:Drug Compounding / Q000379:methods*; D016503:Drug Delivery Systems / Q000379:methods; D004343:Drug Implants / Q000737:chemistry*; D005079:Excipients / Q000737:chemistry; D009593:Nitroimidazoles / Q000737:chemistry*; D011092:Polyethylene Glycols / Q000737:chemistry; D011109:Polymethacrylic Acids / Q000737:chemistry*; D012995:Solubility; D013213:Starch / Q000031:analogs & derivatives / Q000737:chemistry
chemical_list: D004343:Drug Implants; D005079:Excipients; D009593:Nitroimidazoles; D011109:Polymethacrylic Acids; D011092:Polyethylene Glycols; C012553:spherons; D002482:Cellulose; D013213:Starch; C048390:sodium starch glycolate; D002266:Carboxymethylcellulose Sodium; C109691:microcrystalline cellulose; C009999:benzonidazole
keywords: Benznidazole; Chagas disease; disintegrating agent; dissolution; mixture design; pellets