Studies on gynaecological hydrophilic lactic acid preparations, part 6: use of Eudragit E-100 as lactic acid carrier in intravaginal tablets.
Hydrophilic intravaginal tablets based on methylcellulose and containing lactic acid component with Eudragit E-100 undergo swelling in standard conditions. A high flow-limit of the gel that originates from the tablets as well as its dynamic viscosity should allow for the durable dosage form in the vagina. By choosing a 1:1 ratio of lactic acid to Eudragit E-100, it is possible to obtain tablets disintegrating into a gelform at physiological range of 3.8-4.4. An increase in the amount of lactic acid in the complex in relation to the polymer up to 2:1 and 3:1 ratios results in gels with a lower pH. These gels possess an acid reserve that might be ableto neutralise the excess of alkali present in severe vaginal infections.
Małolepsza-Jarmołowska
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Department of Pharmaceutical Technology, Faculty of Pharmacy, Wrocław Medical University, Wrocław, Poland.
Kubis
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Hirnle
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D000282:Administration, Intravaginal; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D004337:Drug Carriers; D005782:Gels; D006245:Hardness Tests; D006863:Hydrogen-Ion Concentration; D019344:Lactic Acid / Q000008:administration & dosage*; D008747:Methylcellulose; D010592:Pharmaceutic Aids; D011109:Polymethacrylic Acids; D013607:Tablets; D014783:Viscosity
D004337:Drug Carriers; D005782:Gels; D010592:Pharmaceutic Aids; D011109:Polymethacrylic Acids; D013607:Tablets; C038300:methylmethacrylate-methacrylic acid copolymer; D019344:Lactic Acid; D008747:Methylcellulose