title: Formulation and evaluation of diazepam hydrogel for rectal administration.
abstract: Diazepam (DZP) has become a commonly used drug for treatment of acute repetitive epileptic seizures and febrile convulsions in children. Considering the advantages of rectal administration of DZP, the objective of our study was to formulate and evaluate rectal hydrogels containing DZP as a drug substance in combination with suitable co-solvents and preservatives. Prepared HPMC (hydroxypropyl methylcellulose) hydrogels containing different concentrations of DZP (2, 4 and 6 mg mL(-1)) manifested good quality in respect to physico-chemical parameters (pH value, drug content, ingredients content and viscosity), antimicrobial efficiency and microbiological quality. Under the proposed HPLC conditions, satisfactory separation of DZP and the preservatives used was achieved. In vitro release studies have shown that the total amount of DZP was released in a period of 3 h. Prepared formulations were stable for four months at 26 degrees C (ambient temperature characteristic of the 2nd climate zone).
authors.affiliation: Department of Pharmaceutical Technology Faculty of Pharmacy, University Ss Cyril and Methodious, 1000 Skopje, Macedonia. magl@baba.ff.ukim.edu.mk
authors.forename: Marija Glavas
authors.initials: MG
authors.lastname: Dodov
authors.forename: Katerina
authors.initials: K
authors.lastname: Goracinova
authors.forename: Maja
authors.initials: M
authors.lastname: Simonoska
authors.forename: Suzana
authors.initials: S
authors.lastname: Trajkovic-Jolevska
authors.forename: Jasmina Tonic
authors.initials: JT
authors.lastname: Ribarska
authors.forename: Marija Dastevska
authors.initials: MD
authors.lastname: Mitevska
mesh_terms: D000285:Administration, Rectal; D000927:Anticonvulsants / Q000008:administration & dosage / Q000737:chemistry*; D003975:Diazepam / Q000008:administration & dosage / Q000737:chemistry*; D004339:Drug Compounding; D004355:Drug Stability; D020100:Hydrogels; D006863:Hydrogen-Ion Concentration; D065347:Hypromellose Derivatives; D008747:Methylcellulose / Q000031:analogs & derivatives / Q000737:chemistry; D012212:Rheology; D012995:Solubility; D014783:Viscosity
chemical_list: D000927:Anticonvulsants; D020100:Hydrogels; D065347:Hypromellose Derivatives; D008747:Methylcellulose; D003975:Diazepam