Orally disintegrating tablet evaluating method, and orally disintegrating tablet evaluating device

An orally disintegrating tablet evaluating method comprising:

• measuring a first mass of an orally disintegrating tablet;
• placing the orally disintegrating tablet on a preparation placement surface of a test solution supply unit, the test solution supply unit including a sample storage unit having a space to store the orally disintegrating tablet and a test solution supply member arranged on an inner bottom face of the sample storage unit, and the test solution supply member having the preparation placement surface and a test solution to supply the test solution to a first end of the orally disintegrating tablet;
• measuring a test solution absorption time to penetrate from the first end of the orally disintegrating tablet in contact with the preparation placement surface to a second end of the orally disintegrating tablet;
• measuring a second mass of the orally disintegrating tablet for which the time for the test solution to penetrate has been measured;
• and
• calculating a test solution absorption rate of the orally disintegrating tablet by the following formula (1);
• wherein
• the test solution is selected from the group consisting of water, artificial saliva and buffer solution,
• oral disintegration times of orally disintegrating tablets are separately measured,
• reciprocals of the oral disintegration times of orally disintegrating tablets are plotted with respect to test solution absorption rates of the orally disintegrating tablets calculated with the above defined calculation method using the formula (1), to obtain a correlation curve between the test solution absorption rates of the orally disintegrating tablets and the reciprocals of the oral disintegration times, and
• the orally disintegrating tablet is evaluated based on a test solution absorption rate of the orally disintegrating tablet of 0.004 g/sec:
• the test solution absorption rate of the orally disintegrating tablet=(the second mass of the orally disintegrating tablet−the first mass of the orally disintegrating tablet)/(the time for the test solution to penetrate from the first end to the second end of the orally disintegrating tablet) (1).