초록 ▼

A controlled release pharmaceutical formulation is provided which releases a pharmaceutical of a basic character at a controlled rate regardless of the pH of the environment, which formulation includes a basic pharmaceutical, up to about 45% by weight of a pH dependent polymer which is a salt of alg

A controlled release pharmaceutical formulation is provided which releases a pharmaceutical of a basic character at a controlled rate regardless of the pH of the environment, which formulation includes a basic pharmaceutical, up to about 45% by weight of a pH dependent polymer which is a salt of alginic acid, such as sodium alginate, up to about 35% by weight of a pH-independent hydrocarbon gelling agent having a viscosity of up to about 100,000 centipoises in 2% solution at 20°C., binder and excipients.

대표청구항 ▼

A controlled release pharmaceutical formulation from which a pharmaceutical of a basic character is released at a controlled rate irrespective of the pH of the environment, consisting essentially of a pharmaceutical of a basic character, a pH-dependent polymer which is a salt of alginic acid, in an

A controlled release pharmaceutical formulation from which a pharmaceutical of a basic character is released at a controlled rate irrespective of the pH of the environment, consisting essentially of a pharmaceutical of a basic character, a pH-dependent polymer which is a salt of alginic acid, in an amount of from about 15 to about 45% by weight of the formulation, said salt of alginic acid having a viscosity of within the range of from about 4 to about 500 centipoises in 1% solution at 25°C.; a pH-independent hydrocolloid gelling agent having a viscosity within the range of from about 50 to about 100,000 centipoises in 2% solution at 20°C., in an amount within the range of from about 3 to about 35% by weight of the formulation, and binder, said formulation being free of calcium ion.