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Pharmaceutical Manufacturing Handbook: Production and

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1004 TABLET DESIGN<br />

TABLE 9<br />

Papaverin<br />

Binder<br />

Chitin<br />

Chitosan<br />

Croscarmelose sodium<br />

Dibasic calcium<br />

phosphate<br />

Magnesium stearate<br />

TABLE 10<br />

Formulation with Chitin, Chitosan, <strong>and</strong> Croscarmelose Sodium<br />

I<br />

19.25<br />

10.00<br />

—<br />

—<br />

—<br />

70.00<br />

0.75<br />

II<br />

18.25<br />

10.00<br />

1.00<br />

—<br />

—<br />

70.00<br />

0.75<br />

Results for Direct Compression<br />

Weight, mg<br />

348<br />

Release at 30 min, % < 40<br />

Disintegration, min > 60<br />

Hardness, kgf - Erw 3.92<br />

Friability<br />

2.44<br />

TABLE 11<br />

Weight, mg<br />

Release at 30 min, %<br />

Disintegration, min<br />

Hardness, kgf - Erw<br />

Friability<br />

I<br />

II<br />

347<br />

92.6<br />

2.30<br />

3.99<br />

2.24<br />

III<br />

17.50<br />

10.00<br />

1.50<br />

—<br />

—<br />

70.00<br />

0.75<br />

III<br />

345<br />

92.4<br />

1.40<br />

3.97<br />

2.10<br />

IV<br />

18.25<br />

10.00<br />

—<br />

1.00<br />

70.00<br />

0.75<br />

IV<br />

347<br />

94.2<br />

0.28<br />

3.97<br />

2.01<br />

Results for Wet Granulation<br />

FI FII<br />

346.50<br />

81.00<br />

23.70<br />

6.90<br />

0.14<br />

348.20<br />

86.00<br />

23.00<br />

8.20<br />

0.08<br />

V<br />

17.50<br />

10.00<br />

—<br />

1.50<br />

70.00<br />

0.75<br />

V<br />

348<br />

96.6<br />

0.22<br />

4.03<br />

1.97<br />

FIII<br />

349.00<br />

< 70.00<br />

45.30<br />

6.30<br />

0.13<br />

VI<br />

18.25<br />

10.00<br />

1<br />

70.00<br />

0.75<br />

VI<br />

346<br />

92.1<br />

1.30<br />

3.99<br />

1.89<br />

VII<br />

17.50<br />

10.00<br />

1.50<br />

70.00<br />

0.75<br />

VII<br />

347<br />

94.8<br />

1.10<br />

3.92<br />

1.94<br />

of the method used to make tablets (Tables 9 – 11 ) . The disintegrating activity of<br />

carboxymethyl chitosan was affected by the granulation process.<br />

Three formulas were prepared by wet granulation comparing starch, chitin, <strong>and</strong><br />

chitosan as disintegrant (10%) formulations FI (10% starch), FII (10% chitin), <strong>and</strong><br />

FIII (10% chitosan) (Table 11 ) . Chitin has good properties as disintegrant. This<br />

product can be used for direct compression <strong>and</strong> wet granulation. The method for<br />

development (direct compresion or wet granulation) of tablets infl uences chitosan<br />

disintegrant properties.<br />

6.3.6.3 Natural Product as Vehicle for Controlled - Release System<br />

Dextrans are composed of chains of d - glucan (1 – 20 × 10 6 ) with α - 1,6 as the main -<br />

chain linkage <strong>and</strong> variable numbers of α - 1,2, α - 1,3, or α - 1,4 branched - chain linkages.<br />

Dextran is synthesized from sucrose by dextransucrases, glucansucrases, <strong>and</strong> glucosyltransferases<br />

produced by Leuconostoc or Streptococcus . These bacteria growing<br />

in sugar juices produce dextran. High concentrations of dextran on solids ( > 1000 ppm)<br />

can result in severe fi nancial losses to the sugar industry [25] .

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