Abstract
Background: A carrying structure for targeted transdermal drug delivery is a transferosome. These unique liposomes are made of an edge activator and phosphatidylcholine. The most common antiviral drug is acyclovir, a synthetic nucleotide nucleoside analog derived from guanine. It works well to cure the varicella-zoster virus and the virus that causes herpes simplex (HSV), primarily HSV-1 and HSV-2. But its skin permeability is minimal. Therefore, this work aimed to use transferosomes to prepare acyclovir so that it could pass through the skin's barrier function. Objective: This study uses a 32-factorial factorial design to develop a transferosomal gel containing acyclovir through thin-film hydration method for painless acyclovir delivery services for skin disease treatment. Material and Methods: The independent variables are the amount of phospholipid (X1) and tween 80 (X2), while the dependent variables are particle size (Y1) and percentage entrapment efficiency (Y2). To create an ideal formulation, the produced transferosomes were assessed for particle size, in vitro drug release amount, and entrapment efficiency (EE%). A Carbopol 934 gel basis was prepared using the optimized acyclovir transferosome formulation, and its drug concentration, pH, spreadability, viscosity, and stability were assessed. Results: With small particles ranging from 176.6 to 324.4 nm, the produced acyclovir transferosomes had a high EE% range from 66.34 to 76.42 %. According to the in vitro release study, there is a negative correlation between in vitro release and EE%. The formulation TF5, including 1%w/w of carbopol 940, provides a superior profile of drug absorption in vitro. Consequently, acyclovir can enter the skin as transferosomes and cross the stratum corneum barrier. Conclusion: Acyclovir can be transformed into a transfersomal gel, which will improve antiviral efficacy, get over the skin's protective layer, prevent adverse oral reactions, and eventually improve patient adherence. Keywords: Transferosome, Transdermal drug delivery system, Acyclovir, 32 Fractional factorial design, Carbopol 934
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