Wednesday, August 31, 2022 11:50:40 PM
From patent:
Advantageous Effects of Invention
By adding and dissolving an emulsifier having an HLB of at least 10 to at least one compound selected from the group consisting of .omega.3PUFA, its pharmaceutically acceptable salts and esters, the present invention is capable of providing a self-emulsifying composition which has at least one of excellent self-emulsifying property, dispersibility in the composition, emulsion stability, and absorption property, and in particular, oral absorption property and rate under fasting, and which contains no ethanol or has a low ethanol concentration, and which is capable of obviating the problems caused by the ethanol inclusion. The present invention also provides a drug of such self-emulsifying composition, its production method, and the method of its use.
Compared to conventional compositions, the self-emulsifying composition of the present invention which can be rapidly absorbed even in the case of oral administration under fasting is expected to show preventive, ameliorating, and therapeutic effects of the .omega.3PUFA for various diseases. More specifically, the self-emulsifying composition of the present invention shows its effectiveness by the administration of 1 to 3 times a day at non-limited timing, namely, without the limitation of the administering three times a day immediately after the meal, and this convenience for the patients leads to the improved drug compliance, and hence, further improvement in the effectiveness. In addition, the self-emulsifying composition of the present invention can be combined with a drug which is administered not by the administration immediately after the meal, and a drug which is a combination with such drug may also be produced. Furthermore, the self-emulsifying composition of the present invention is expected to show various clinical merits such as suppression of the serum TG increase after the meal by administering the composition before the meal and prevention of essential fatty acid deficiency associated with lipase inhibitor administration by administration of the composition before going to the bed.
Compared to the conventional emulsion preparation, the self-emulsifying composition of the present invention can be produced, delivered, and stored at reduced cost and with less trouble. In addition, the self-emulsifying composition of the present invention can be prepared water-free with higher concentration of the effective components, and hence, at reduced preparation volume, and this enables administration of the composition to patients with water intake restriction. Furthermore, the self-emulsifying composition of the present invention can be encapsulated in a gelatin capsule or the like, and this is expected to improve both drug convenience and drug compliance.
Due to the non-inclusion or reduced inclusion of the ethanol in the self-emulsifying composition of the present invention, this composition has reduced risk of capsule deformation and bubble entrapment by the ethanol volatilization during the capsulation step, and in particular, during the drying step, and also, reduced risk of quality change such as capsule deformation and crack generation by the ethanol volatilization during the distribution and storage process. This composition also has reduced risk of the denaturing such as clouding and separation of the capsule content by the ethanol volatilization. Furthermore, side effects of the ethanol are absent or reduced in alcohol (ethanol) intolerant patients, and it is expected that the composition can be safely administered for a long period.
Of the .omega.3PUFAs and pharmaceutically acceptable salts and esters thereof, EPA-E is known as a highly safe drug effective component. However, on rare occasion, EPA-E suffers from side effects such as vomiturition (0.21%), nausea (0.23%), and stomach discomfort (0.23%). The present invention is expected to enable decrease of the dose and/or frequency of the at least one compound selected from the group consisting of .omega.3PUFA and pharmaceutically acceptable salts and esters thereof, and the amelioration of the side effects leads to improvement in the drug compliance, and also, continuation of the therapy in the patients who would have been forced to terminate the administration due to the side effects.
In addition, an ameliorating or therapeutic drug for chronic diseases such as dyslipidemia basically needs continuous administration for a long period, and in the case of such administration, the present invention is expected to realize amelioration and treatment by reduced dose and frequency.
In advanced countries such as Japan, the U.S., and Europe, use of alternative medicine has increased, and examples include use of special purpose foods, functional health foods (designated health food and functional nutritional food), and health foods (supplements). The self-emulsifying composition containing at least one compound selected from the group consisting of .omega.3PUFA and pharmaceutically acceptable salts and esters thereof and an emulsifier having an HLB of at least 10 can be provided as a functional health food for human for those in need of the .omega.3PUFA, for example, those suffering from or those within the risk of suffering from dyslipidemia, peripheral circulatory insufficiency, and metabolic syndrome in order to prevent further occurrence of the cerebrovascular event or progress into ulcer and gangrene of extremities and peripheries to thereby maintain the quality of life.
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