Abstract: Provided is a method of synthesizing apatite powder by emitting a laser beam to a surface of a substrate immersed in a precursor solution. The method is including immersing a substrate in an apatite-forming precursor solution, emitting a laser beam to a region on a surface of the substrate immersed in the precursor solution, and obtaining apatite powder generated in the precursor solution.

Abstract: Provided is an oral pharmaceutical formulation including sustained-release pellets containing tamsulosin hydrochloride and a pharmaceutically acceptable additive, wherein the sustained-release pellets includes about 50 wt % to about 100 wt % of particles having a particle size of about 0.50 mm to about 0.85 mm, and less than about 15 wt % of particles having a particle size less than about 0.50 mm. The oral pharmaceutical formulation may have a reduced deviation in dissolution rate of tamsulosin hydrochloride and improved content uniformity among unit dosage forms, and have ensured quality due to high reproducibility of unit dosage forms.

Abstract: An oral pharmaceutical formulation containing sustained-release granules including tamsulosin hydrochloride and a method of preparing the oral pharmaceutical formulation are provided. In the oral pharmaceutical formulation, the sustained-release granules includes about 10 parts to about 300 parts by weight of polyvinyl acetate, about 5 parts to about 250 parts by weight of hydroxypropyl methylcellulose, and about 1 part to about 450 parts by weight of a diluting agent with respect to 1 part by weight of tamsulosin hydrochloride, and a weight ratio of the sustained-release granules with respect to 1 part by weight of tamsulosin hydrochloride is about 360 to 495 parts by weight.