The invention, which belongs to the
medicine field, relates to development for a tanshinol-
naringenin composite pellet. Tanshinol being a water-soluble component of the root of red-rooted
salvia being Chinese
medicine is effective in treating
angina pectoris. At present, most of tanshinol preparations being available in the market are immediate-release dosage forms that can not satisfy the demand of long-term therapy for
angina pectoris; the
bioavailability, being lower than 10%, of the preparation is low and the
metabolism is fast, wherein t1 / 2 is equal to 0.5h approximately; and the pure sustained-release pellet can not keep enough
blood concentration for long time and thus is not effective in treating
angina pectoris. Besides,
naringenin is capable of inhibiting activity of P450enzymeCYP3A4; and after taking of the
naringenin with tanshinol, the
metabolic process of the tanshinol
in vivo can be inhibited, so that the
bioavailability of tanshinol is enhanced and the
plasma clearance is reduced. Therefore, according to development provided by the invention, tanshinol and naringenin are prepared into a
composite pellet. In addition,
enterohepatic circulation exists during oral naringenin taking and thus a long-acting effect can be realized by an immediate-release
dosage form, so that the naringenin is prepared into an immediate-release pellet and the tanshinol is prepared into a sustained-release pellet.