• Journal of Pharmaceutical Investigation
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• v.23 no.4
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• pp.217-223
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• 1993

The combined products of antacid and anti-ulcer agent were prepared with antacid composed of aluminium hydroxide dried gel, magnesium hydroxide and simethicone with a ratio of 1:1:0.1 (M) and anti-ulcer agent, aceglutamide aluminium (AGA). The efficacy of antacid was evaluated in vitro with Fuchs, Johnson-Duncan and Rosset-Rice methods and in vivo using an aspiration method in rat. The addition of anti-ulcer agent did not affect the neutralizing capacity of M significantly. The combined products with the M/AGA ratios of 2.3:1 and 3.4:1 produced the maximum pH of $4.0{\sim}5.8$ and the duration time of $64{\sim}137$ min in vitro test. The in vivo neutralizing test in rats showed the rapid increase of gastric pH up to 3.5 within 30 min and the gastric pH of $4{\sim}6$ was kept for 5 hr.

• Journal of Pharmaceutical Investigation
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• v.20 no.3
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• pp.115-119
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• 1990

The reaction rates, duration times and neutralizing capacities of the antacids which are frequently used in Korean market and three different commercial combination products were evaluated in vitro by Fuchs method and Johnson-duncan method, respectively. In vivo tests of combination products were determined in the fasted state of rat by Aspiration method. Comparing the result of in vitro test with that of in vivo test, the maximal pH was lowered by 2-3 value and the durational time increased by two folds in vivo test. Each antacid composition and combination products from three phamaceutical companies (A, B, and C) were studied, respectively. The duration times measured by Fuchs method were double compared to those by Johnson-Duncan method. A and C preparation maintained the pH range from 3 to 7 for 60 min by Fuchs method. In vovo test, maximum pH of A, B and C preparation was 6.50, 3.65, 2.65 and duration time of those was 200, 500, 0 min, respectively.

• Advances in Traditional Medicine
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• v.7 no.4
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• pp.441-443
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• 2007

A preliminary in vitro acid neutralizing capacity test of twelve traditional Ayurvedic antacids were performed in this study. Five traditional preparations of ash of conch shell, ash of oyster, ash of pearl, limestone, and ash of cowrie showed high acid neutralizing capacity similar to standard antacid combination of $Al(OH)_3\;and\;Mg(OH)_2$. Among these the ash of conch shell found the highest acid neutralizing capacity. The ash of tamarind and ash of Achyranthus aspera showed moderate acid neutralizing capacity. The acid neutralizing capacity of red ochre; ash of iron; mixture of niter, alum and ammonium chloride; saltpeter; and ash of mica found below the USP 23 limit.