- About project
- Results and Awards
- Affiliate Programs
- International services
Pashnev Petro, professor, ph.d. of pharmaceutics, full professor
National University of Pharmacy, Ukraine
Championship participant: the National Research Analytics Championship - "Ukraine";
Using the symmetric composite uniform-plan of 2nd order the theoretically-grounded composition of tablets based on dry extract of Scutellaria baicalensis has been received.
Keywords: tablets, Scutellaria baicalensis, the optimal composition.
С помощью использования симметричного композиционного униформ-плана 2-го порядка получили теоретически обоснованный состав таблеток на основе сухого экстракта шлемника байкальского.
Ключевые слова: таблетки, шлемник байкальский, оптимальный состав.
The pilot experiment study of the impact of quantitative factors on some indicators showed that their increase did not improve all pharmaco-technological properties for tableting powdery mass and the quality of tablets based on the extract of Scutellaria baicalensis code-named "Skutex". In order to find the optimal composition of the studied tablets it was necessary to determine the optimal ratio of the excipients in the tablet DF in narrower ranges (Table 1). For this purpose the symmetric rotatable composite uniform-plan of 2nd order was used (Table 2).
Quantitative pharmaceutical factors studied during the “Skutex” tablets optimization
Level of factor
х1 –microcrystalline cellulose weight per tablet, g
х2 – GranuLac 200 mass per tablet, g
х3 –croscarmellose sodium mass per tablet, g
During the process of making "Skutex" tablets formulation according to the plan of the experiment in the cases when factors were studied at lower levels or lower "star" points, the average tablet mass was increased with the addition of dried starch in the required quantities.
Experiment planning matrix and research results for tableting powdery mass and "Skutex" tablets
y1 - flowability of tableting mass, g / s;
y2 - resistance to crushing, N;
y3 - tablet abrasion,%;
y4 - disintegration, min.
The relationship between the studied factors and tableting masses flowability is described by the following regression equation:
у1 = 4,001 – 0,096x1 + 2,249x2 + 0,063x3 + 0,036x1x2 + 0,026x1x3 – 0,039x2x3 + 0,021x12–0,048 x22+ 0,016x32
In regression equation only coefficients b0 > 0,155 and b2 > 2,249 were statistically significant. Therefore, the regression equation for tableting mass flowability is as follows:
у1 = 4,001 + 2,249x2
The granulated tableting mass flowability, according to the equation, depends only on the content of lactose monohydrate of GranuLac 200 brand in its composition. The studies showed that, regardless of the studied levels of factors х1 і х2, the flowability most noticeably improves with the increased GranuLac content within the tableting mass from 0.1 to 0.2 g per tablet.
The regression equation, which reflects the dependence of the stability of tablets based on Scutellaria baicalensis extract to crashing on the content of excipients, is as follows:
у2 = 71,604 + 0,909x1 + 2,905x2 – 0,065x3 – 0,55x1x2 – 0,325x1x3 – 0,1x2x3 + 0,385x12–0,765 x22+ 0,509x32
In this regression equation, similar to the previous one, only the coefficients b0 > 0,155 andb2 > 2,249 were statistically significant. Therefore, the regression equation for the tablet resistance to crushing is as follows:
у2 = 71,604 + 2,905x2
The strength of the studied tablets is only affected by the content of GranuLac 200 in their composition.
The research showed that the increasing content of GranuLac 200 in the composition of "Skutex" tablets positively affects the stability of tablets to crushing, and this effect almost does not depend on the studied level of factors х1 and х3.
After the statistical analysis of the results of tablets abrasion based on Scutellaria baicalensis extract the following equation was obtained:
у3 = 0,441 – 0,011x1 – 0,102x2 + 0,016x3 + 0,009x1x2 + 0,009x1x3 – 0,04x2x3 + 0,009x12+0,048 x22+ 0,007x32
In this regression equation coefficients b0, b2, b23 and b22 are statistically significant, therefore the equation is as follows:
у3 = 0,441 – 0,102x2 – 0,04x2x3 + 0,048 x22
So, the abrasion of Scutellaria extract tablets depends on the content of GranuLac 200, as well as on the ratio of this excipient with sodium croscarmellose.
Effect of the content of lactose monohydrate of GranuLac 200 brand on the abrasion of the studied tablets is shown by means of lines in Figure 1.
As seen from the figure, the increase of GranuLac 200 content in tablets based on Scutellaria
baicalensis extract impairs their abrasion. This is especially observed within the range of 0.1 to 0.2 g of GranuLac 200 per tablet in any of its combination with sodium croscarmellose.
Based on the research results of Scutellaria baicalensis extract tablets disintegration the regression based on the research results of Scutellaria baicalensis extract tablets disintegration
Figure1. Dependence of the abrasion of Scutellaria baicalensis extract tablets on the content of GranuLac 200
in their composition the equation for this indicator was made.
у4 = 14,612 + 1,214x1 + 1,927x2 – 1,933x3 – 0,675x1x2 + 0,025x1x3 + 0,276x12+0,223 x22–0,307x32
The coefficients b0, b1, b2 and b3 in this regression equation are statistically significant; considering this we have:
у4 = 14,612 + 1,214x1 + 1,927x2 – 1,933x3
Based on the regression equation we can conclude about the dependence of the disintegration process of the studied tablets on all the three factors.
The effect of MCC content on tablet disintegration time is shown in Figure 2.
Fig 2. Dependence of disintegration time of Scutellaria baicalensis extract tablets on the content of MCC in their composition
Disintegration time of the studied tablets slightly increases with the increasing content of MCC in their composition, but does not exceed 15 minutes. The fastest tablet disintegration was observed when all other factors were studied at the bottom "star" point-line 5.
Using lines figure 3 reflects the influence of lactose monohydrate of GranuLac200 brand on disintegration time of tablets based on Scutellaria baicalensis extract.
Fig 3. Dependence of disintegration time of Scutellaria baicalensis extract tablets on the content of GranuLac200 in their composition
As seen from this figure, disintegration time of the studied tablets noticeably increases together with the icrease of GranuLac content from 0.1 to 0.21 g.
Effect of sodium croscarmellose on the disintegration time of tablets based on Scutellaria baicalensis is shown in figure 4.
Fig. 4. Dependence of the disintegration time of Scutellaria baicalensis tablets on the content of
sodium croscarmellose in theirc omposition
Since sodium croscarmellose is a leavening agent, it is obvious that the increase of its content improves the process of the studied tablets disintegration. This dependence is most expressed within the range of 0.12 - 0.032 g croscarmellose sodium per tablet.
(Line 1 – factors х1 і х2, forinstance, aresubstituted into the equation at the main level;
line 2 – at the upper;
line 3 – at the upper“star” point;
line 4 – at the lower level;
line 5 – at the lower“star” point
line 6 – х1 factorat the upper, х2 at the lower level;
line 7 – х1 factorat the lower, х2 at the upper level.
As long as based on the analysis of regression equations and single-factor figures no interaction between the factors studied was found, to determine the optimal composition of tablets based on Scutellaria baicalensis extract there is no need in finding extremum through the model of 2nd order by bringing it to a canonical form. When choosing optimal quantities of excipients only the boundary optimum should be considered.
The analysis showed that the top level of lactose monohydrate of GranuLac 200 brand provides the satisfactory value of flowability, abrasion and resistance to crushing. The further increase of the content of the excipient from 0.2 to 0.21 g per tablet is not reasonable as it practically does not improve the above-mentioned statements but negatively affects the disintegration of tablets. Therefore it was decided to stabilize factor х2on the upper level.
Since the MCC and sodium croscarmellose only affect disintegration of tablets based on Scutellaria baicalensis extract, while determining their optimal quantities the results of the previous experiment were also taken into account. Accordingly, it was decided to stabilize factors х1 і х5 at a lower level.
Conclusions.So, based on symmetric composite rotatable design of 2nd order the theoretically-grounded composition of tablets code-named "Skutex" was obtained which was also proved experimentally.
1. Сліпченко Г.Д.Дослідження з вибору допоміжних речовин при розробці препарату з рослинної сировини для поліпшення інтеграційної діяльності головного мозку/ Г.Д Сліпченко, І.І. Басакіна// Запорожский медицинский журнал, Запоріжжя: Вид-во ЗДМУ.-2012.-С 97-101.
2.Сліпченко Г.Д. Дослідження впливу вмісту допоміжних речовин у складі таблеток «СКУТЕКС» на їх основні показники і на властивості маси для таблетування/ Г.Д.Сліпченко, Н.М.Белєй// Збірник наукових праць співробітників НМАПО імені П.Л.Щупика, вип.18, книга 3, Київ, 2012.- С. 359-365.
3. Математичне планування експерименту при проведенні наукових досліджень фармації/ [Грошовий Т.А., Марценюк В.П., Кучеренко Л.І. та ін.]; під ред. Т.А. Грошового.-Тернопіль: ТДМУ, Укрмедкнига, 2008.-367с.
4. Васенда М.М. Оптимізація складу та технології таблеток магнію аспарагінату з вітаміном В6/ М.М. Васенда, Т.А.Грошовий//Фармацевтичний часопис.- 2011.-№ 1.-С.25-27.
5.Тригубчак О.В. Розробка оптимального складу кишково-розчинних таблеток кислоти ацетилсаліцилової, отриманих методом прямого пресування/О.В.Тригубчак, Т.А. Грошовий//Фармацевтичний часопис.- 2011.-№ 4.-С.54-57.