摘要:
The invention provides sustained release formulations comprising donepezil, stereoisomers of donepezil, pharmaceutically acceptable salts of donepezil, or pharmaceutically acceptable salts of stereoisomers of donepezil. The formulations have desirable pharmacokinetic characteristics. Examples include AUC, Tmax, Cmax, dosage-corrected AUC, and dosage-corrected Cmax.
摘要:
The invention provides sustained release formulations of basic drugs, stereoisomers of basic drugs, pharmaceutically acceptable salts of basic drugs, and pharmaceutically acceptable salts of stereoisomers of basic drugs. The basic drugs may be anti-dementia drugs, such as cholinesterase inhibitors or memantine. In one embodiment, the cholinesterase inhibitor is donepezil.
摘要:
A matrix type sustained-release preparation and a manufacturing method therefor are provided wherein dissolution with low pH dependence of a basic drug or a salt thereof at the early stage of dissolution can be ensured in a dissolution test, and wherein as the dissolution test proceeds, a ratio of a dissolution rate of the basic drug or the salt thereof in an acidic test solution to a dissolution rate of the basic drug or the salt thereof in a neutral test solution (dissolution rate in the acidic test solution/dissolution rate in the neutral test solution) decreases with dissolution time at the late stage of dissolution, as compared to the early stage of dissolution. According to the present invention, the matrix type sustained-release preparation contains a basic drug or a salt thereof and at least one enteric polymer, in which solubility of the basic drug or the salt thereof in a 0.1 N hydrochloric acid solution and a neutral aqueous solution, pH 6.0 is higher than in a basic aqueous solution, pH 8.0.
摘要:
The present invention provides a method for stabilizing an anti-dementia drug in a pharmaceutical composition containing the anti-dementia drug and a high molecular weight basic substance by adding a high molecular weight acidic substance to said pharmaceutical composition. Further, the present invention provides a pharmaceutical composition containing an anti-dementia drug and a high molecular basic substance in which a high molecular weight acidic substance is contained for stabilizing the anti-dementia drug. Furthermore, the present invention provides a method for manufacturing a pharmaceutical composition which comprises steps wherein a solution or suspension containing a high molecular weight acidic substance is added to a mixture of an anti-dementia drug and a high molecular weight basic substance for the sake of stabilizing the anti-dementia drug.
摘要:
An object of the present invention is to provide, for the case of implementing a therapeutic method in which at least two kinds of anti-dementia drugs are used together, a composition that has a good therapeutic effect on the dementia, and also gives excellent compliance. Another object of the present invention is to provide a composition containing at least two kinds of the anti-dementia drugs, for which release of the anti-dementia drugs from the composition is controlled, whereby a combined effect of the anti-dementia drugs can be achieved well. Still another object of the present invention is to provide: a composition, for which the frequency of administration and the amount taken are reduced, and hence compliance can be improved; and a method of manufacturing such a composition. According to the present invention, there are provided a composition containing at least two kinds of the anti-dementia drugs; such a composition containing at least one sustained release portion containing an anti-dementia drug; and such a composition containing at least one cholinesterase inhibitor, and at least one N-methyl-D-aspartate receptor antagonist.
摘要:
The present invention provides a method for stabilizing an anti-dementia drug in a pharmaceutical composition containing the anti-dementia drug and a high molecular weight basic substance by adding a high molecular weight acidic substance to said pharmaceutical composition. Further, the present invention provides a pharmaceutical composition containing an anti-dementia drug and a high molecular basic substance in which a high molecular weight acidic substance is contained for stabilizing the anti-dementia drug. Furthermore, the present invention provides a method for manufacturing a pharmaceutical composition which comprises steps wherein a solution or suspension containing a high molecular weight acidic substance is added to a mixture of an anti-dementia drug and a high molecular weight basic substance for the sake of stabilizing the anti-dementia drug.
摘要:
The present invention provides a method for stabilizing an anti-dementia drug in a pharmaceutical composition containing the anti-dementia drug and a high molecular weight basic substance by adding a high molecular weight acidic substance to said pharmaceutical composition. Further, the present invention provides a pharmaceutical composition containing an anti-dementia drug and a high molecular basic substance in which a high molecular weight acidic substance is contained for stabilizing the anti-dementia drug. Furthermore, the present invention provides a method for manufacturing a pharmaceutical composition which comprises steps wherein a solution or suspension containing a high molecular weight acidic substance is added to a mixture of an anti-dementia drug and a high molecular weight basic substance for the sake of stabilizing the anti-dementia drug.
摘要:
A matrix type sustained-release preparation and a manufacturing method therefor are provided wherein dissolution with low pH dependence of a basic drug or a salt thereof at the early stage of dissolution can be ensured in a dissolution test, and wherein as the dissolution test proceeds, a ratio of a dissolution rate of the basic drug or the salt thereof in an acidic test solution to a dissolution rate of the basic drug or the salt thereof in a neutral test solution (dissolution rate in the acidic test solution/dissolution rate in the neutral test solution) decreases with dissolution time at the late stage of dissolution, as compared to the early stage of dissolution. According to the present invention, the matrix type sustained-release preparation contains a basic drug or a salt thereof and at least one enteric polymer, in which solubility of the basic drug or the salt thereof in a 0.1 N hydrochloric acid solution and a neutral aqueous solution, pH 6.0 is higher than in a basic aqueous solution, pH 8.0.
摘要:
The present invention provides a method for stabilizing an anti-dementia drug in a pharmaceutical composition containing the anti-dementia drug and a high molecular weight basic substance by adding a high molecular weight acidic substance to said pharmaceutical composition. Further, the present invention provides a pharmaceutical composition containing an anti-dementia drug and a high molecular basic substance in which a high molecular weight acidic substance is contained for stabilizing the anti-dementia drug. Furthermore, the present invention provides a method for manufacturing a pharmaceutical composition which comprises steps wherein a solution or suspension containing a high molecular weight acidic substance is added to a mixture of an anti-dementia drug and a high molecular weight basic substance for the sake of stabilizing the anti-dementia drug.
摘要:
A matrix type sustained-release preparation and a manufacturing method therefor are provided wherein dissolution with low pH dependence of a basic drug or a salt thereof at the early stage of dissolution can be ensured in a dissolution test, and wherein as the dissolution test proceeds, a ratio of a dissolution rate of the basic drug or the salt thereof in an acidic test solution to a dissolution rate of the basic drug or the salt thereof in a neutral test solution (dissolution rate in the acidic test solution/dissolution rate in the neutral test solution) decreases with dissolution time at the late stage of dissolution, as compared to the early stage of dissolution. According to the present invention, the matrix type sustained-release preparation contains a basic drug or a salt thereof and at least one enteric polymer, in which solubility of the basic drug or the salt thereof in a 0.1 N hydrochloric acid solution and a neutral aqueous solution, pH 6.0 is higher than in a basic aqueous solution, pH 8.0.