Ethics code: IR.MUMS.PHARMACY.REC.1397.098
				
				
				
                    
                    
                     
                     
                     
                    
                    
                    
                    
                     Kamali H,  Khodaverdi E,  Jafarzadeh N,  Rezaeian Shiadeh S N,  Hadizadeh F. Sustained Release In-situ Forming Liquid Crystal Gel Containing Risperidone: In-vitro Evaluation and Pharmacokinetics in Rabbits.  North Khorasan University of Medical Sciences 2023; 15 (2) :1-12
URL: 
http://journal.nkums.ac.ir/article-1-2785-en.html   
                    
                    
                    
					 
					
                 
                
                    
                    
                    
                    1- Assistant Professor, Ph.D. in Pharmaceutics, Targeted Drug Delivery Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran 
 2- Professor, Ph.D. in Pharmaceutics, Department of Pharmaceutics, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran 
 3- Student, Pharm.D, Department of Pharmaceutics, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran 
 4- Assistant Professor, Ph.D. in Pharmaceutics, Department of Pharmaceutics, School of Pharmacy, Hormozgan University of Medical Sciences, Bandar abbas, Iran 
 5- Professor, Ph.D. in Medicinal Chemistry, Department of Medicinal Chemistry, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran 
                    
                    
                    Abstract:       (1331 Views)
                    
                    
                    Introduction: The present study aimed to extend a novel vehicle for sustained delivery of risperidone to improve schizophrenia therapy. Risperidone is used as an anti-psychotic drug to treat various psychological conditions. Lipid liquid crystal (LLC) gel containing various lipids, solvents, and stabilizers turns into a sustain-release gel in contact with the aqueous medium.
Method: Glycerol monooleate (GMO), glycerol dioleate (GDO), and glycerol trioleate (GTO) alongside several ratios of phosphatidylcholine (PC) to oil and N-methyl-2-pyrrolidone (NMP) solvent percent (w/w %) were assessed for initial burst release (IBR) for LLC. Some In-vitro evaluations, pharmacokinetics assessments, and histopathological studies were done to gain optimal formulation.
Results: the GDO-based LLC showed lower IBR in comparison to other glycerol-based formulations. Pharmacokinetic data revealed that GDO at PC:oil = 2.2:1 and NMP = 30% made a sustained release for two months. Risperdal CONSTA® can reach the required therapeutic levels after 2–3 weeks; however, over the lag period, co-administration of oral risperidone is essential. The histopathology results indicated approximately no side effects in rabbits.
Conclusion: This study confirms the great potential of GDO-based LLC in comparison to Risperdal CONSTA®. Furthermore, the results showed that a single injection of GDO-based formulations could maintain drug release in both in-vitro and in-vivo for two months in the therapeutic range.
                     
                    
                    
                    
                    
                    Type of Study:  
Orginal Research |
                    Subject: 
                    
Basic Sciences  Received: 2022/01/29 | Accepted: 2023/03/4 | Published: 2023/08/26