Abstract: Disclosed herein is an electrowetting system based on the electrowetting phenomenon. The electrowetting system comprises an electrolyte solution and optionally an insulating solution wherein the electrolyte solution includes a first salt having a molar mass of 100 or below and a solubility of 27 g or above in 100 g of water, a second salt (a chaotropic salt) containing an ion with a negative Jones-Dole coefficient (B), a third salt containing an ion with a Setschenow constant (ks) of 0.150 or above, and the salts are in the range of 10 to 30% by weight with respect to the total weight of the electrolyte solution. A mixture of the salts having different inherent characteristics is used as the electrolyte solution of the electrowetting system.

Abstract: Provided is a controlled-release formulation of tamsulosin hydrochloride, which includes a granular core, and a drug-coating layer coated on the granular core, including the tamsulosin hydrochloride and a release-controlling agent selected from the group consisting of (a) a first copolymer of 1 part by weight of ethylacrylate, 2 parts by weight of methylmethacrylate, and 0.1 parts by weight of trimethylammonioethyl methacrylate chloride, (b) a mixture of the first copolymer and a second copolymer of 1 part by weight of ethylacrylate, 2 parts by weight of methylmethacrylate, and 0.2 parts by weight of trimethylammonioethyl methacrylate chloride, the weight ratio between the first copolymer and the second copolymer being 1: 0.05 to 0.2, and (c) polyvinylacetate. A process for preparing the controlled-release formulation of the tamsulosin hydrochloride is also provided.