When the consumer takes a conventional dosage form, the AI blood concentration increases relatively fast, within 0.5-2 hours. This immediate increase is followed by a sharp decrease in AI concentration due to distribution to other tissues or elimination. Thus, the person needs to take a second dose within 4-6 hours, in order to keep the effective blood concentration. The danger here is that, by each time consuming a conventional dosage form, the plasma concentration goes up to the region that side effects are prevalent, because of high AI concentration.
In contrast, when the person takes a time-release product, the AI concentration appears only in the “therapeutic window” range. As it is seen, the AI concentration appears in a constant level in blood and decreases gradually after 8 hours. In this way we get the desired plasma level of AI as well as avoiding the incidence of side effects.